From f9c076df319609e530dc8ac0431dd028564d5332 Mon Sep 17 00:00:00 2001
From: brendanlaschke <brendan.laschke@googlemail.com>
Date: Thu, 7 Nov 2024 18:13:22 +0100
Subject: [PATCH] o365 calendar sync (#8044)

Implemented:

* Account Connect
* Calendar sync via delta ids then requesting single events


I think I would split the messaging part into a second pr - that's a
step more complex then the calendar :)

---------

Co-authored-by: bosiraphael <raphael.bosi@gmail.com>
---
 package.json                                  |   2 +
 ...tionBannerReconnectAccountEmailAliases.tsx |   6 +-
 ...econnectAccountInsufficientPermissions.tsx |   6 +-
 ...tingsAccountsConnectedAccountsListCard.tsx |   9 +-
 .../SettingsAccountsListEmptyStateCard.tsx    |  33 ++-
 .../SettingsAccountsRowDropdownMenu.tsx       |   7 +-
 ...ogleApisOAuth.ts => useTriggerApiOAuth.ts} |  44 ++--
 .../WorkflowEditActionFormSendEmail.tsx       |   9 +-
 .../modules/workspace/types/FeatureFlagKey.ts |   1 +
 .../src/pages/onboarding/SyncEmails.tsx       |   6 +-
 packages/twenty-server/.env.example           |   1 +
 .../typeorm-seeds/core/feature-flags.ts       |   5 +
 .../engine/core-modules/auth/auth.module.ts   |   4 +
 .../microsoft-apis-auth.controller.ts         | 105 +++++++++
 ...pis-oauth-exchange-code-for-token.guard.ts |  31 +++
 ...mircosoft-apis-oauth-request-code.guard.ts |  62 +++++
 .../auth/services/google-apis.service.ts      |  10 +-
 .../auth/services/microsoft-apis.service.ts   | 212 ++++++++++++++++++
 ...crosoft-apis-oauth-common.auth.strategy.ts |  31 +++
 ...h-exchange-code-for-token.auth.strategy.ts |  48 ++++
 ...t-apis-oauth-request-code.auth.strategy.ts |  28 +++
 .../auth/types/microsoft-api-request.type.ts  |  23 ++
 .../utils/get-microsoft-apis-oauth-scopes.ts  |  12 +
 .../environment/environment-variables.ts      |   4 +
 .../enums/feature-flag-key.enum.ts            |   1 +
 .../engine/core-modules/user/user.resolver.ts |   1 -
 .../calendar-event-import-manager.module.ts   |  12 +-
 .../calendar-event-import-batch-size.ts       |   1 +
 .../calendar-event-list-fetch.cron.command.ts |   6 +-
 .../commands/calendar-import.cron.command.ts  |  32 +++
 .../calendar-event-list-fetch.cron.job.ts     |   8 +-
 .../jobs/calendar-events-import.cron.job.ts   |  87 +++++++
 .../google-calendar-get-events.service.ts     |   1 +
 .../microsoft-calendar-driver.module.ts       |  20 ++
 .../microsoft-calendar-get-events.service.ts  |  62 +++++
 ...icrosoft-calendar-import-events.service.ts |  45 ++++
 .../format-microsoft-calendar-event.util.ts   |  60 +++++
 .../parse-microsoft-calendar-error.util.ts    |  65 ++++++
 .../jobs/calendar-event-list-fetch.job.ts     |  12 +-
 .../jobs/calendar-events-import.job.ts        |  75 +++++++
 .../calendar-events-import.service.ts         |  89 ++++----
 .../services/calendar-fetch-events.service.ts | 129 +++++++++++
 .../services/calendar-get-events.service.ts   |  17 +-
 .../utils/filter-events.util.ts               |   2 +-
 ...microsoft-oauth2-client-manager.service.ts |  62 +++++
 .../oauth2-client-manager.module.ts           |   9 +-
 .../connected-account.workspace-entity.ts     |   1 +
 .../messaging-get-message-list.service.ts     |  12 +
 .../self-hosting/self-hosting-var.mdx         |   1 +
 yarn.lock                                     |  28 +++
 50 files changed, 1418 insertions(+), 119 deletions(-)
 rename packages/twenty-front/src/modules/settings/accounts/hooks/{useTriggerGoogleApisOAuth.ts => useTriggerApiOAuth.ts} (55%)
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/controllers/microsoft-apis-auth.controller.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/guards/microsoft-apis-oauth-exchange-code-for-token.guard.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/guards/mircosoft-apis-oauth-request-code.guard.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/services/microsoft-apis.service.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-common.auth.strategy.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-exchange-code-for-token.auth.strategy.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-request-code.auth.strategy.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/types/microsoft-api-request.type.ts
 create mode 100644 packages/twenty-server/src/engine/core-modules/auth/utils/get-microsoft-apis-oauth-scopes.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/constants/calendar-event-import-batch-size.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-import.cron.command.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-events-import.cron.job.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/microsoft-calendar-driver.module.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-get-events.service.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-import-events.service.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/format-microsoft-calendar-event.util.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/parse-microsoft-calendar-error.util.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-events-import.job.ts
 create mode 100644 packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service.ts
 create mode 100644 packages/twenty-server/src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service.ts

diff --git a/package.json b/package.json
index 41e8e4b35b23..c9c7f6f1ef34 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "@linaria/core": "^6.2.0",
     "@linaria/react": "^6.2.1",
     "@mdx-js/react": "^3.0.0",
+    "@microsoft/microsoft-graph-client": "^3.0.7",
     "@nestjs/apollo": "^11.0.5",
     "@nestjs/axios": "^3.0.1",
     "@nestjs/cli": "^9.0.0",
@@ -201,6 +202,7 @@
     "@graphql-codegen/typescript": "^3.0.4",
     "@graphql-codegen/typescript-operations": "^3.0.4",
     "@graphql-codegen/typescript-react-apollo": "^3.3.7",
+    "@microsoft/microsoft-graph-types": "^2.40.0",
     "@nestjs/cli": "^9.0.0",
     "@nestjs/schematics": "^9.0.0",
     "@nestjs/testing": "^9.0.0",
diff --git a/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountEmailAliases.tsx b/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountEmailAliases.tsx
index c3f381c1bcd5..67fc042a92e2 100644
--- a/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountEmailAliases.tsx
+++ b/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountEmailAliases.tsx
@@ -1,7 +1,7 @@
 import { InformationBanner } from '@/information-banner/components/InformationBanner';
 import { useAccountToReconnect } from '@/information-banner/hooks/useAccountToReconnect';
 import { InformationBannerKeys } from '@/information-banner/types/InformationBannerKeys';
-import { useTriggerGoogleApisOAuth } from '@/settings/accounts/hooks/useTriggerGoogleApisOAuth';
+import { useTriggerApisOAuth } from '@/settings/accounts/hooks/useTriggerApiOAuth';
 import { IconRefresh } from 'twenty-ui';
 
 export const InformationBannerReconnectAccountEmailAliases = () => {
@@ -9,7 +9,7 @@ export const InformationBannerReconnectAccountEmailAliases = () => {
     InformationBannerKeys.ACCOUNTS_TO_RECONNECT_EMAIL_ALIASES,
   );
 
-  const { triggerGoogleApisOAuth } = useTriggerGoogleApisOAuth();
+  const { triggerApisOAuth } = useTriggerApisOAuth();
 
   if (!accountToReconnect) {
     return null;
@@ -20,7 +20,7 @@ export const InformationBannerReconnectAccountEmailAliases = () => {
       message={`Please reconnect your mailbox ${accountToReconnect?.handle} to update your email aliases:`}
       buttonTitle="Reconnect"
       buttonIcon={IconRefresh}
-      buttonOnClick={() => triggerGoogleApisOAuth()}
+      buttonOnClick={() => triggerApisOAuth(accountToReconnect.provider)}
     />
   );
 };
diff --git a/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountInsufficientPermissions.tsx b/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountInsufficientPermissions.tsx
index 7f74a129b652..306452b56292 100644
--- a/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountInsufficientPermissions.tsx
+++ b/packages/twenty-front/src/modules/information-banner/components/reconnect-account/InformationBannerReconnectAccountInsufficientPermissions.tsx
@@ -1,7 +1,7 @@
 import { InformationBanner } from '@/information-banner/components/InformationBanner';
 import { useAccountToReconnect } from '@/information-banner/hooks/useAccountToReconnect';
 import { InformationBannerKeys } from '@/information-banner/types/InformationBannerKeys';
-import { useTriggerGoogleApisOAuth } from '@/settings/accounts/hooks/useTriggerGoogleApisOAuth';
+import { useTriggerApisOAuth } from '@/settings/accounts/hooks/useTriggerApiOAuth';
 import { IconRefresh } from 'twenty-ui';
 
 export const InformationBannerReconnectAccountInsufficientPermissions = () => {
@@ -9,7 +9,7 @@ export const InformationBannerReconnectAccountInsufficientPermissions = () => {
     InformationBannerKeys.ACCOUNTS_TO_RECONNECT_INSUFFICIENT_PERMISSIONS,
   );
 
-  const { triggerGoogleApisOAuth } = useTriggerGoogleApisOAuth();
+  const { triggerApisOAuth } = useTriggerApisOAuth();
 
   if (!accountToReconnect) {
     return null;
@@ -21,7 +21,7 @@ export const InformationBannerReconnectAccountInsufficientPermissions = () => {
     reconnect for updates:`}
       buttonTitle="Reconnect"
       buttonIcon={IconRefresh}
-      buttonOnClick={() => triggerGoogleApisOAuth()}
+      buttonOnClick={() => triggerApisOAuth(accountToReconnect.provider)}
     />
   );
 };
diff --git a/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsConnectedAccountsListCard.tsx b/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsConnectedAccountsListCard.tsx
index 238371241d0a..6000afa1fe98 100644
--- a/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsConnectedAccountsListCard.tsx
+++ b/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsConnectedAccountsListCard.tsx
@@ -1,5 +1,5 @@
 import { useNavigate } from 'react-router-dom';
-import { IconGoogle } from 'twenty-ui';
+import { IconComponent, IconGoogle, IconMicrosoft } from 'twenty-ui';
 
 import { ConnectedAccount } from '@/accounts/types/ConnectedAccount';
 import { SettingsAccountsListEmptyStateCard } from '@/settings/accounts/components/SettingsAccountsListEmptyStateCard';
@@ -9,6 +9,11 @@ import { SettingsPath } from '@/types/SettingsPath';
 import { SettingsAccountsConnectedAccountsRowRightContainer } from '@/settings/accounts/components/SettingsAccountsConnectedAccountsRowRightContainer';
 import { SettingsListCard } from '../../components/SettingsListCard';
 
+const ProviderIcons: { [k: string]: IconComponent } = {
+  google: IconGoogle,
+  microsoft: IconMicrosoft,
+};
+
 export const SettingsAccountsConnectedAccountsListCard = ({
   accounts,
   loading,
@@ -27,7 +32,7 @@ export const SettingsAccountsConnectedAccountsListCard = ({
       items={accounts}
       getItemLabel={(account) => account.handle}
       isLoading={loading}
-      RowIcon={IconGoogle}
+      RowIconFn={(row) => ProviderIcons[row.provider]}
       RowRightComponent={({ item: account }) => (
         <SettingsAccountsConnectedAccountsRowRightContainer account={account} />
       )}
diff --git a/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsListEmptyStateCard.tsx b/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsListEmptyStateCard.tsx
index 8500264c4125..d532691fcc5b 100644
--- a/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsListEmptyStateCard.tsx
+++ b/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsListEmptyStateCard.tsx
@@ -1,7 +1,14 @@
+import { useTriggerApisOAuth } from '@/settings/accounts/hooks/useTriggerApiOAuth';
+import { useIsFeatureEnabled } from '@/workspace/hooks/useIsFeatureEnabled';
 import styled from '@emotion/styled';
-import { Button, Card, CardContent, CardHeader, IconGoogle } from 'twenty-ui';
-
-import { useTriggerGoogleApisOAuth } from '@/settings/accounts/hooks/useTriggerGoogleApisOAuth';
+import {
+  Button,
+  Card,
+  CardContent,
+  CardHeader,
+  IconGoogle,
+  IconMicrosoft,
+} from 'twenty-ui';
 
 const StyledHeader = styled(CardHeader)`
   align-items: center;
@@ -12,6 +19,7 @@ const StyledHeader = styled(CardHeader)`
 const StyledBody = styled(CardContent)`
   display: flex;
   justify-content: center;
+  gap: ${({ theme }) => theme.spacing(2)};
 `;
 
 type SettingsAccountsListEmptyStateCardProps = {
@@ -21,11 +29,10 @@ type SettingsAccountsListEmptyStateCardProps = {
 export const SettingsAccountsListEmptyStateCard = ({
   label,
 }: SettingsAccountsListEmptyStateCardProps) => {
-  const { triggerGoogleApisOAuth } = useTriggerGoogleApisOAuth();
-
-  const handleOnClick = async () => {
-    await triggerGoogleApisOAuth();
-  };
+  const { triggerApisOAuth } = useTriggerApisOAuth();
+  const isMicrosoftSyncEnabled = useIsFeatureEnabled(
+    'IS_MICROSOFT_SYNC_ENABLED',
+  );
 
   return (
     <Card>
@@ -35,8 +42,16 @@ export const SettingsAccountsListEmptyStateCard = ({
           Icon={IconGoogle}
           title="Connect with Google"
           variant="secondary"
-          onClick={handleOnClick}
+          onClick={() => triggerApisOAuth('google')}
         />
+        {isMicrosoftSyncEnabled && (
+          <Button
+            Icon={IconMicrosoft}
+            title="Connect with Microsoft"
+            variant="secondary"
+            onClick={() => triggerApisOAuth('microsoft')}
+          />
+        )}
       </StyledBody>
     </Card>
   );
diff --git a/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsRowDropdownMenu.tsx b/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsRowDropdownMenu.tsx
index de3da46619df..d4edf45e6fb1 100644
--- a/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsRowDropdownMenu.tsx
+++ b/packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsRowDropdownMenu.tsx
@@ -12,7 +12,7 @@ import {
 import { ConnectedAccount } from '@/accounts/types/ConnectedAccount';
 import { CoreObjectNameSingular } from '@/object-metadata/types/CoreObjectNameSingular';
 import { useDestroyOneRecord } from '@/object-record/hooks/useDestroyOneRecord';
-import { useTriggerGoogleApisOAuth } from '@/settings/accounts/hooks/useTriggerGoogleApisOAuth';
+import { useTriggerApisOAuth } from '@/settings/accounts/hooks/useTriggerApiOAuth';
 import { Dropdown } from '@/ui/layout/dropdown/components/Dropdown';
 import { DropdownMenu } from '@/ui/layout/dropdown/components/DropdownMenu';
 import { DropdownMenuItemsContainer } from '@/ui/layout/dropdown/components/DropdownMenuItemsContainer';
@@ -35,8 +35,7 @@ export const SettingsAccountsRowDropdownMenu = ({
   const { destroyOneRecord } = useDestroyOneRecord({
     objectNameSingular: CoreObjectNameSingular.ConnectedAccount,
   });
-
-  const { triggerGoogleApisOAuth } = useTriggerGoogleApisOAuth();
+  const { triggerApisOAuth } = useTriggerApisOAuth();
 
   return (
     <Dropdown
@@ -71,7 +70,7 @@ export const SettingsAccountsRowDropdownMenu = ({
                 LeftIcon={IconRefresh}
                 text="Reconnect"
                 onClick={() => {
-                  triggerGoogleApisOAuth();
+                  triggerApisOAuth(account.provider);
                   closeDropdown();
                 }}
               />
diff --git a/packages/twenty-front/src/modules/settings/accounts/hooks/useTriggerGoogleApisOAuth.ts b/packages/twenty-front/src/modules/settings/accounts/hooks/useTriggerApiOAuth.ts
similarity index 55%
rename from packages/twenty-front/src/modules/settings/accounts/hooks/useTriggerGoogleApisOAuth.ts
rename to packages/twenty-front/src/modules/settings/accounts/hooks/useTriggerApiOAuth.ts
index d17e4242afb1..f66f6ca6de65 100644
--- a/packages/twenty-front/src/modules/settings/accounts/hooks/useTriggerGoogleApisOAuth.ts
+++ b/packages/twenty-front/src/modules/settings/accounts/hooks/useTriggerApiOAuth.ts
@@ -8,21 +8,35 @@ import {
   useGenerateTransientTokenMutation,
 } from '~/generated/graphql';
 
-export const useTriggerGoogleApisOAuth = () => {
+const getProviderUrl = (provider: string) => {
+  switch (provider) {
+    case 'google':
+      return 'google-apis';
+    case 'microsoft':
+      return 'microsoft-apis';
+    default:
+      throw new Error(`Provider ${provider} is not supported`);
+  }
+};
+
+export const useTriggerApisOAuth = () => {
   const [generateTransientToken] = useGenerateTransientTokenMutation();
 
-  const triggerGoogleApisOAuth = useCallback(
-    async ({
-      redirectLocation,
-      messageVisibility,
-      calendarVisibility,
-      loginHint,
-    }: {
-      redirectLocation?: AppPath | string;
-      messageVisibility?: MessageChannelVisibility;
-      calendarVisibility?: CalendarChannelVisibility;
-      loginHint?: string;
-    } = {}) => {
+  const triggerApisOAuth = useCallback(
+    async (
+      provider: string,
+      {
+        redirectLocation,
+        messageVisibility,
+        calendarVisibility,
+        loginHint,
+      }: {
+        redirectLocation?: AppPath | string;
+        messageVisibility?: MessageChannelVisibility;
+        calendarVisibility?: CalendarChannelVisibility;
+        loginHint?: string;
+      } = {},
+    ) => {
       const authServerUrl = REACT_APP_SERVER_BASE_URL;
 
       const transientToken = await generateTransientToken();
@@ -46,10 +60,10 @@ export const useTriggerGoogleApisOAuth = () => {
 
       params += loginHint ? `&loginHint=${loginHint}` : '';
 
-      window.location.href = `${authServerUrl}/auth/google-apis?${params}`;
+      window.location.href = `${authServerUrl}/auth/${getProviderUrl(provider)}?${params}`;
     },
     [generateTransientToken],
   );
 
-  return { triggerGoogleApisOAuth };
+  return { triggerApisOAuth };
 };
diff --git a/packages/twenty-front/src/modules/workflow/components/WorkflowEditActionFormSendEmail.tsx b/packages/twenty-front/src/modules/workflow/components/WorkflowEditActionFormSendEmail.tsx
index d1a18ff2ff18..4dafbc3b4aa2 100644
--- a/packages/twenty-front/src/modules/workflow/components/WorkflowEditActionFormSendEmail.tsx
+++ b/packages/twenty-front/src/modules/workflow/components/WorkflowEditActionFormSendEmail.tsx
@@ -2,7 +2,7 @@ import { GMAIL_SEND_SCOPE } from '@/accounts/constants/GmailSendScope';
 import { ConnectedAccount } from '@/accounts/types/ConnectedAccount';
 import { currentWorkspaceMemberState } from '@/auth/states/currentWorkspaceMemberState';
 import { useFindManyRecords } from '@/object-record/hooks/useFindManyRecords';
-import { useTriggerGoogleApisOAuth } from '@/settings/accounts/hooks/useTriggerGoogleApisOAuth';
+import { useTriggerApisOAuth } from '@/settings/accounts/hooks/useTriggerApiOAuth';
 import { Select, SelectOption } from '@/ui/input/components/Select';
 import { WorkflowEditGenericFormBase } from '@/workflow/components/WorkflowEditGenericFormBase';
 import { VariableTagInput } from '@/workflow/search-variables/components/VariableTagInput';
@@ -38,7 +38,8 @@ export const WorkflowEditActionFormSendEmail = (
 ) => {
   const theme = useTheme();
   const currentWorkspaceMember = useRecoilValue(currentWorkspaceMemberState);
-  const { triggerGoogleApisOAuth } = useTriggerGoogleApisOAuth();
+  const { triggerApisOAuth } = useTriggerApisOAuth();
+
   const workflowId = useRecoilValue(workflowIdState);
   const redirectUrl = `/object/workflow/${workflowId}`;
 
@@ -66,7 +67,7 @@ export const WorkflowEditActionFormSendEmail = (
       !isDefined(scopes) ||
       !isDefined(scopes.find((scope) => scope === GMAIL_SEND_SCOPE))
     ) {
-      await triggerGoogleApisOAuth({
+      await triggerApisOAuth('google', {
         redirectLocation: redirectUrl,
         loginHint: connectedAccount.handle,
       });
@@ -183,7 +184,7 @@ export const WorkflowEditActionFormSendEmail = (
               options={connectedAccountOptions}
               callToActionButton={{
                 onClick: () =>
-                  triggerGoogleApisOAuth({ redirectLocation: redirectUrl }),
+                  triggerApisOAuth('google', { redirectLocation: redirectUrl }),
                 Icon: IconPlus,
                 text: 'Add account',
               }}
diff --git a/packages/twenty-front/src/modules/workspace/types/FeatureFlagKey.ts b/packages/twenty-front/src/modules/workspace/types/FeatureFlagKey.ts
index 60c7579ac425..c8f427d8cff6 100644
--- a/packages/twenty-front/src/modules/workspace/types/FeatureFlagKey.ts
+++ b/packages/twenty-front/src/modules/workspace/types/FeatureFlagKey.ts
@@ -16,4 +16,5 @@ export type FeatureFlagKey =
   | 'IS_SSO_ENABLED'
   | 'IS_UNIQUE_INDEXES_ENABLED'
   | 'IS_ARRAY_AND_JSON_FILTER_ENABLED'
+  | 'IS_MICROSOFT_SYNC_ENABLED'
   | 'IS_ADVANCED_FILTERS_ENABLED';
diff --git a/packages/twenty-front/src/pages/onboarding/SyncEmails.tsx b/packages/twenty-front/src/pages/onboarding/SyncEmails.tsx
index 4657a2aba6e0..e8945edb7424 100644
--- a/packages/twenty-front/src/pages/onboarding/SyncEmails.tsx
+++ b/packages/twenty-front/src/pages/onboarding/SyncEmails.tsx
@@ -10,10 +10,10 @@ import { Title } from '@/auth/components/Title';
 import { currentUserState } from '@/auth/states/currentUserState';
 import { OnboardingSyncEmailsSettingsCard } from '@/onboarding/components/OnboardingSyncEmailsSettingsCard';
 import { useSetNextOnboardingStatus } from '@/onboarding/hooks/useSetNextOnboardingStatus';
-import { useTriggerGoogleApisOAuth } from '@/settings/accounts/hooks/useTriggerGoogleApisOAuth';
 import { PageHotkeyScope } from '@/types/PageHotkeyScope';
 import { useScopedHotkeys } from '@/ui/utilities/hotkey/hooks/useScopedHotkeys';
 
+import { useTriggerApisOAuth } from '@/settings/accounts/hooks/useTriggerApiOAuth';
 import { AppPath } from '@/types/AppPath';
 import {
   CalendarChannelVisibility,
@@ -38,7 +38,7 @@ const StyledActionLinkContainer = styled.div`
 
 export const SyncEmails = () => {
   const theme = useTheme();
-  const { triggerGoogleApisOAuth } = useTriggerGoogleApisOAuth();
+  const { triggerApisOAuth } = useTriggerApisOAuth();
   const setNextOnboardingStatus = useSetNextOnboardingStatus();
   const currentUser = useRecoilValue(currentUserState);
   const [visibility, setVisibility] = useState<MessageChannelVisibility>(
@@ -53,7 +53,7 @@ export const SyncEmails = () => {
         ? CalendarChannelVisibility.ShareEverything
         : CalendarChannelVisibility.Metadata;
 
-    await triggerGoogleApisOAuth({
+    await triggerApisOAuth('google', {
       redirectLocation: AppPath.Index,
       messageVisibility: visibility,
       calendarVisibility: calendarChannelVisibility,
diff --git a/packages/twenty-server/.env.example b/packages/twenty-server/.env.example
index 2006ed2eee27..6054688dc782 100644
--- a/packages/twenty-server/.env.example
+++ b/packages/twenty-server/.env.example
@@ -29,6 +29,7 @@ ACCESS_TOKEN_SECRET=replace_me_with_a_random_string_access
 # AUTH_MICROSOFT_TENANT_ID=replace_me_with_azure_tenant_id
 # AUTH_MICROSOFT_CLIENT_SECRET=replace_me_with_azure_client_secret
 # AUTH_MICROSOFT_CALLBACK_URL=http://localhost:3000/auth/microsoft/redirect
+# AUTH_MICROSOFT_APIS_CALLBACK_URL=http://localhost:3000/auth/microsoft-apis/get-access-token
 # AUTH_GOOGLE_ENABLED=false
 # AUTH_GOOGLE_CLIENT_ID=replace_me_with_google_client_id
 # AUTH_GOOGLE_CLIENT_SECRET=replace_me_with_google_client_secret
diff --git a/packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts b/packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts
index 0313ed5dc92b..0c75053e1560 100644
--- a/packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts
+++ b/packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts
@@ -75,6 +75,11 @@ export const seedFeatureFlags = async (
         workspaceId: workspaceId,
         value: false,
       },
+      {
+        key: FeatureFlagKey.IsMicrosoftSyncEnabled,
+        workspaceId: workspaceId,
+        value: true,
+      },
       {
         key: FeatureFlagKey.IsAdvancedFiltersEnabled,
         workspaceId: workspaceId,
diff --git a/packages/twenty-server/src/engine/core-modules/auth/auth.module.ts b/packages/twenty-server/src/engine/core-modules/auth/auth.module.ts
index 9386c26690c1..2d6fc31b65a0 100644
--- a/packages/twenty-server/src/engine/core-modules/auth/auth.module.ts
+++ b/packages/twenty-server/src/engine/core-modules/auth/auth.module.ts
@@ -8,11 +8,13 @@ import { AppToken } from 'src/engine/core-modules/app-token/app-token.entity';
 import { AppTokenService } from 'src/engine/core-modules/app-token/services/app-token.service';
 import { GoogleAPIsAuthController } from 'src/engine/core-modules/auth/controllers/google-apis-auth.controller';
 import { GoogleAuthController } from 'src/engine/core-modules/auth/controllers/google-auth.controller';
+import { MicrosoftAPIsAuthController } from 'src/engine/core-modules/auth/controllers/microsoft-apis-auth.controller';
 import { MicrosoftAuthController } from 'src/engine/core-modules/auth/controllers/microsoft-auth.controller';
 import { SSOAuthController } from 'src/engine/core-modules/auth/controllers/sso-auth.controller';
 import { VerifyAuthController } from 'src/engine/core-modules/auth/controllers/verify-auth.controller';
 import { ApiKeyService } from 'src/engine/core-modules/auth/services/api-key.service';
 import { GoogleAPIsService } from 'src/engine/core-modules/auth/services/google-apis.service';
+import { MicrosoftAPIsService } from 'src/engine/core-modules/auth/services/microsoft-apis.service';
 import { OAuthService } from 'src/engine/core-modules/auth/services/oauth.service';
 import { ResetPasswordService } from 'src/engine/core-modules/auth/services/reset-password.service';
 import { SignInUpService } from 'src/engine/core-modules/auth/services/sign-in-up.service';
@@ -80,6 +82,7 @@ import { JwtAuthStrategy } from './strategies/jwt.auth.strategy';
     GoogleAuthController,
     MicrosoftAuthController,
     GoogleAPIsAuthController,
+    MicrosoftAPIsAuthController,
     VerifyAuthController,
     SSOAuthController,
   ],
@@ -90,6 +93,7 @@ import { JwtAuthStrategy } from './strategies/jwt.auth.strategy';
     SamlAuthStrategy,
     AuthResolver,
     GoogleAPIsService,
+    MicrosoftAPIsService,
     AppTokenService,
     AccessTokenService,
     LoginTokenService,
diff --git a/packages/twenty-server/src/engine/core-modules/auth/controllers/microsoft-apis-auth.controller.ts b/packages/twenty-server/src/engine/core-modules/auth/controllers/microsoft-apis-auth.controller.ts
new file mode 100644
index 000000000000..d0aec9e129bb
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/controllers/microsoft-apis-auth.controller.ts
@@ -0,0 +1,105 @@
+import {
+  Controller,
+  Get,
+  Req,
+  Res,
+  UseFilters,
+  UseGuards,
+} from '@nestjs/common';
+
+import { Response } from 'express';
+
+import {
+  AuthException,
+  AuthExceptionCode,
+} from 'src/engine/core-modules/auth/auth.exception';
+import { AuthRestApiExceptionFilter } from 'src/engine/core-modules/auth/filters/auth-rest-api-exception.filter';
+import { MicrosoftAPIsOauthExchangeCodeForTokenGuard } from 'src/engine/core-modules/auth/guards/microsoft-apis-oauth-exchange-code-for-token.guard';
+import { MicrosoftAPIsOauthRequestCodeGuard } from 'src/engine/core-modules/auth/guards/mircosoft-apis-oauth-request-code.guard';
+import { MicrosoftAPIsService } from 'src/engine/core-modules/auth/services/microsoft-apis.service';
+import { TransientTokenService } from 'src/engine/core-modules/auth/token/services/transient-token.service';
+import { MicrosoftAPIsRequest } from 'src/engine/core-modules/auth/types/microsoft-api-request.type';
+import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+import { OnboardingService } from 'src/engine/core-modules/onboarding/onboarding.service';
+
+@Controller('auth/microsoft-apis')
+@UseFilters(AuthRestApiExceptionFilter)
+export class MicrosoftAPIsAuthController {
+  constructor(
+    private readonly microsoftAPIsService: MicrosoftAPIsService,
+    private readonly transientTokenService: TransientTokenService,
+    private readonly environmentService: EnvironmentService,
+    private readonly onboardingService: OnboardingService,
+  ) {}
+
+  @Get()
+  @UseGuards(MicrosoftAPIsOauthRequestCodeGuard)
+  async MicrosoftAuth() {
+    // As this method is protected by Microsoft Auth guard, it will trigger Microsoft SSO flow
+    return;
+  }
+
+  @Get('get-access-token')
+  @UseGuards(MicrosoftAPIsOauthExchangeCodeForTokenGuard)
+  async MicrosoftAuthGetAccessToken(
+    @Req() req: MicrosoftAPIsRequest,
+    @Res() res: Response,
+  ) {
+    const { user } = req;
+
+    const {
+      emails,
+      accessToken,
+      refreshToken,
+      transientToken,
+      redirectLocation,
+      calendarVisibility,
+      messageVisibility,
+    } = user;
+
+    const { workspaceMemberId, userId, workspaceId } =
+      await this.transientTokenService.verifyTransientToken(transientToken);
+
+    const demoWorkspaceIds = this.environmentService.get('DEMO_WORKSPACE_IDS');
+
+    if (demoWorkspaceIds.includes(workspaceId)) {
+      throw new AuthException(
+        'Cannot connect Microsoft account to demo workspace',
+        AuthExceptionCode.FORBIDDEN_EXCEPTION,
+      );
+    }
+
+    if (!workspaceId) {
+      throw new AuthException(
+        'Workspace not found',
+        AuthExceptionCode.WORKSPACE_NOT_FOUND,
+      );
+    }
+
+    const handle = emails[0].value;
+
+    await this.microsoftAPIsService.refreshMicrosoftRefreshToken({
+      handle,
+      workspaceMemberId: workspaceMemberId,
+      workspaceId: workspaceId,
+      accessToken,
+      refreshToken,
+      calendarVisibility,
+      messageVisibility,
+    });
+
+    if (userId) {
+      await this.onboardingService.setOnboardingConnectAccountPending({
+        userId,
+        workspaceId,
+        value: false,
+      });
+    }
+
+    return res.redirect(
+      `${this.environmentService.get('FRONT_BASE_URL')}${
+        redirectLocation || '/settings/accounts'
+      }`,
+    );
+  }
+}
diff --git a/packages/twenty-server/src/engine/core-modules/auth/guards/microsoft-apis-oauth-exchange-code-for-token.guard.ts b/packages/twenty-server/src/engine/core-modules/auth/guards/microsoft-apis-oauth-exchange-code-for-token.guard.ts
new file mode 100644
index 000000000000..db94e5d1fec2
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/guards/microsoft-apis-oauth-exchange-code-for-token.guard.ts
@@ -0,0 +1,31 @@
+import { ExecutionContext, Injectable } from '@nestjs/common';
+import { AuthGuard } from '@nestjs/passport';
+
+import { MicrosoftAPIsOauthExchangeCodeForTokenStrategy } from 'src/engine/core-modules/auth/strategies/microsoft-apis-oauth-exchange-code-for-token.auth.strategy';
+import { setRequestExtraParams } from 'src/engine/core-modules/auth/utils/google-apis-set-request-extra-params.util';
+import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+
+@Injectable()
+export class MicrosoftAPIsOauthExchangeCodeForTokenGuard extends AuthGuard(
+  'microsoft-apis',
+) {
+  constructor(private readonly environmentService: EnvironmentService) {
+    super();
+  }
+
+  async canActivate(context: ExecutionContext) {
+    const request = context.switchToHttp().getRequest();
+    const state = JSON.parse(request.query.state);
+
+    new MicrosoftAPIsOauthExchangeCodeForTokenStrategy(this.environmentService);
+
+    setRequestExtraParams(request, {
+      transientToken: state.transientToken,
+      redirectLocation: state.redirectLocation,
+      calendarVisibility: state.calendarVisibility,
+      messageVisibility: state.messageVisibility,
+    });
+
+    return (await super.canActivate(context)) as boolean;
+  }
+}
diff --git a/packages/twenty-server/src/engine/core-modules/auth/guards/mircosoft-apis-oauth-request-code.guard.ts b/packages/twenty-server/src/engine/core-modules/auth/guards/mircosoft-apis-oauth-request-code.guard.ts
new file mode 100644
index 000000000000..427c8fde6488
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/guards/mircosoft-apis-oauth-request-code.guard.ts
@@ -0,0 +1,62 @@
+import { ExecutionContext, Injectable } from '@nestjs/common';
+import { AuthGuard } from '@nestjs/passport';
+
+import {
+  AuthException,
+  AuthExceptionCode,
+} from 'src/engine/core-modules/auth/auth.exception';
+import { MicrosoftAPIsOauthRequestCodeStrategy } from 'src/engine/core-modules/auth/strategies/microsoft-apis-oauth-request-code.auth.strategy';
+import { TransientTokenService } from 'src/engine/core-modules/auth/token/services/transient-token.service';
+import { setRequestExtraParams } from 'src/engine/core-modules/auth/utils/google-apis-set-request-extra-params.util';
+import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+import { FeatureFlagKey } from 'src/engine/core-modules/feature-flag/enums/feature-flag-key.enum';
+import { FeatureFlagService } from 'src/engine/core-modules/feature-flag/services/feature-flag.service';
+
+@Injectable()
+export class MicrosoftAPIsOauthRequestCodeGuard extends AuthGuard(
+  'microsoft-apis',
+) {
+  constructor(
+    private readonly environmentService: EnvironmentService,
+    private readonly featureFlagService: FeatureFlagService,
+    private readonly transientTokenService: TransientTokenService,
+  ) {
+    super({
+      prompt: 'select_account',
+    });
+  }
+
+  async canActivate(context: ExecutionContext) {
+    const request = context.switchToHttp().getRequest();
+
+    const { workspaceId } =
+      await this.transientTokenService.verifyTransientToken(
+        request.query.transientToken,
+      );
+    const isMicrosoftSyncEnabled =
+      await this.featureFlagService.isFeatureEnabled(
+        FeatureFlagKey.IsMicrosoftSyncEnabled,
+        workspaceId,
+      );
+
+    if (!isMicrosoftSyncEnabled) {
+      throw new AuthException(
+        'Microsoft sync is not enabled',
+        AuthExceptionCode.FORBIDDEN_EXCEPTION,
+      );
+    }
+
+    new MicrosoftAPIsOauthRequestCodeStrategy(this.environmentService);
+    setRequestExtraParams(request, {
+      transientToken: request.query.transientToken,
+      redirectLocation: request.query.redirectLocation,
+      calendarVisibility: request.query.calendarVisibility,
+      messageVisibility: request.query.messageVisibility,
+      loginHint: request.query.loginHint,
+    });
+
+    const activate = (await super.canActivate(context)) as boolean;
+
+    return activate;
+  }
+}
diff --git a/packages/twenty-server/src/engine/core-modules/auth/services/google-apis.service.ts b/packages/twenty-server/src/engine/core-modules/auth/services/google-apis.service.ts
index 04c77d2d9c19..ad60b010d258 100644
--- a/packages/twenty-server/src/engine/core-modules/auth/services/google-apis.service.ts
+++ b/packages/twenty-server/src/engine/core-modules/auth/services/google-apis.service.ts
@@ -3,14 +3,17 @@ import { Injectable } from '@nestjs/common';
 import { EntityManager } from 'typeorm';
 import { v4 } from 'uuid';
 
+import { getGoogleApisOauthScopes } from 'src/engine/core-modules/auth/utils/get-google-apis-oauth-scopes';
 import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+import { FeatureFlagKey } from 'src/engine/core-modules/feature-flag/enums/feature-flag-key.enum';
+import { FeatureFlagService } from 'src/engine/core-modules/feature-flag/services/feature-flag.service';
 import { InjectMessageQueue } from 'src/engine/core-modules/message-queue/decorators/message-queue.decorator';
 import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
 import { MessageQueueService } from 'src/engine/core-modules/message-queue/services/message-queue.service';
 import { TwentyORMGlobalManager } from 'src/engine/twenty-orm/twenty-orm-global.manager';
 import {
   CalendarEventListFetchJob,
-  CalendarEventsImportJobData,
+  CalendarEventListFetchJobData,
 } from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job';
 import {
   CalendarChannelVisibility,
@@ -33,9 +36,6 @@ import {
   MessagingMessageListFetchJobData,
 } from 'src/modules/messaging/message-import-manager/jobs/messaging-message-list-fetch.job';
 import { WorkspaceMemberWorkspaceEntity } from 'src/modules/workspace-member/standard-objects/workspace-member.workspace-entity';
-import { getGoogleApisOauthScopes } from 'src/engine/core-modules/auth/utils/get-google-apis-oauth-scopes';
-import { FeatureFlagService } from 'src/engine/core-modules/feature-flag/services/feature-flag.service';
-import { FeatureFlagKey } from 'src/engine/core-modules/feature-flag/enums/feature-flag-key.enum';
 
 @Injectable()
 export class GoogleAPIsService {
@@ -222,7 +222,7 @@ export class GoogleAPIsService {
       });
 
       for (const calendarChannel of calendarChannels) {
-        await this.calendarQueueService.add<CalendarEventsImportJobData>(
+        await this.calendarQueueService.add<CalendarEventListFetchJobData>(
           CalendarEventListFetchJob.name,
           {
             calendarChannelId: calendarChannel.id,
diff --git a/packages/twenty-server/src/engine/core-modules/auth/services/microsoft-apis.service.ts b/packages/twenty-server/src/engine/core-modules/auth/services/microsoft-apis.service.ts
new file mode 100644
index 000000000000..b8f6197226aa
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/services/microsoft-apis.service.ts
@@ -0,0 +1,212 @@
+import { Injectable } from '@nestjs/common';
+
+import { EntityManager } from 'typeorm';
+import { v4 } from 'uuid';
+
+import { getMicrosoftApisOauthScopes } from 'src/engine/core-modules/auth/utils/get-microsoft-apis-oauth-scopes';
+import { InjectMessageQueue } from 'src/engine/core-modules/message-queue/decorators/message-queue.decorator';
+import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
+import { MessageQueueService } from 'src/engine/core-modules/message-queue/services/message-queue.service';
+import { TwentyORMGlobalManager } from 'src/engine/twenty-orm/twenty-orm-global.manager';
+import {
+  CalendarEventListFetchJob,
+  CalendarEventListFetchJobData,
+} from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job';
+import {
+  CalendarChannelVisibility,
+  CalendarChannelWorkspaceEntity,
+} from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
+import { AccountsToReconnectService } from 'src/modules/connected-account/services/accounts-to-reconnect.service';
+import {
+  ConnectedAccountProvider,
+  ConnectedAccountWorkspaceEntity,
+} from 'src/modules/connected-account/standard-objects/connected-account.workspace-entity';
+import {
+  MessageChannelSyncStage,
+  MessageChannelSyncStatus,
+  MessageChannelType,
+  MessageChannelVisibility,
+  MessageChannelWorkspaceEntity,
+} from 'src/modules/messaging/common/standard-objects/message-channel.workspace-entity';
+import { WorkspaceMemberWorkspaceEntity } from 'src/modules/workspace-member/standard-objects/workspace-member.workspace-entity';
+
+@Injectable()
+export class MicrosoftAPIsService {
+  constructor(
+    private readonly twentyORMGlobalManager: TwentyORMGlobalManager,
+    @InjectMessageQueue(MessageQueue.calendarQueue)
+    private readonly calendarQueueService: MessageQueueService,
+    private readonly accountsToReconnectService: AccountsToReconnectService,
+  ) {}
+
+  async refreshMicrosoftRefreshToken(input: {
+    handle: string;
+    workspaceMemberId: string;
+    workspaceId: string;
+    accessToken: string;
+    refreshToken: string;
+    calendarVisibility: CalendarChannelVisibility | undefined;
+    messageVisibility: MessageChannelVisibility | undefined;
+  }) {
+    const {
+      handle,
+      workspaceId,
+      workspaceMemberId,
+      calendarVisibility,
+      messageVisibility,
+    } = input;
+
+    const connectedAccountRepository =
+      await this.twentyORMGlobalManager.getRepositoryForWorkspace<ConnectedAccountWorkspaceEntity>(
+        workspaceId,
+        'connectedAccount',
+      );
+
+    const connectedAccount = await connectedAccountRepository.findOne({
+      where: { handle, accountOwnerId: workspaceMemberId },
+    });
+
+    const existingAccountId = connectedAccount?.id;
+    const newOrExistingConnectedAccountId = existingAccountId ?? v4();
+
+    const calendarChannelRepository =
+      await this.twentyORMGlobalManager.getRepositoryForWorkspace<CalendarChannelWorkspaceEntity>(
+        workspaceId,
+        'calendarChannel',
+      );
+
+    const messageChannelRepository =
+      await this.twentyORMGlobalManager.getRepositoryForWorkspace<MessageChannelWorkspaceEntity>(
+        workspaceId,
+        'messageChannel',
+      );
+
+    const workspaceDataSource =
+      await this.twentyORMGlobalManager.getDataSourceForWorkspace(workspaceId);
+
+    const scopes = getMicrosoftApisOauthScopes();
+
+    await workspaceDataSource.transaction(async (manager: EntityManager) => {
+      if (!existingAccountId) {
+        await connectedAccountRepository.save(
+          {
+            id: newOrExistingConnectedAccountId,
+            handle,
+            provider: ConnectedAccountProvider.MICROSOFT,
+            accessToken: input.accessToken,
+            refreshToken: input.refreshToken,
+            accountOwnerId: workspaceMemberId,
+            scopes,
+          },
+          {},
+          manager,
+        );
+
+        // TODO: Modify this when the email sync is implemented
+        await messageChannelRepository.save(
+          {
+            id: v4(),
+            connectedAccountId: newOrExistingConnectedAccountId,
+            type: MessageChannelType.EMAIL,
+            handle,
+            visibility:
+              messageVisibility || MessageChannelVisibility.SHARE_EVERYTHING,
+            syncStatus: MessageChannelSyncStatus.NOT_SYNCED,
+            syncStage: MessageChannelSyncStage.FAILED,
+          },
+          {},
+          manager,
+        );
+
+        await calendarChannelRepository.save(
+          {
+            id: v4(),
+            connectedAccountId: newOrExistingConnectedAccountId,
+            handle,
+            visibility:
+              calendarVisibility || CalendarChannelVisibility.SHARE_EVERYTHING,
+          },
+          {},
+          manager,
+        );
+      } else {
+        await connectedAccountRepository.update(
+          {
+            id: newOrExistingConnectedAccountId,
+          },
+          {
+            accessToken: input.accessToken,
+            refreshToken: input.refreshToken,
+            scopes,
+          },
+          manager,
+        );
+
+        const workspaceMemberRepository =
+          await this.twentyORMGlobalManager.getRepositoryForWorkspace<WorkspaceMemberWorkspaceEntity>(
+            workspaceId,
+            'workspaceMember',
+          );
+
+        const workspaceMember = await workspaceMemberRepository.findOneOrFail({
+          where: { id: workspaceMemberId },
+        });
+
+        const userId = workspaceMember.userId;
+
+        await this.accountsToReconnectService.removeAccountToReconnect(
+          userId,
+          workspaceId,
+          newOrExistingConnectedAccountId,
+        );
+
+        // TODO: Modify this when the email sync is implemented
+        await messageChannelRepository.update(
+          {
+            connectedAccountId: newOrExistingConnectedAccountId,
+          },
+          {
+            syncStage: MessageChannelSyncStage.FAILED,
+            syncStatus: MessageChannelSyncStatus.NOT_SYNCED,
+            syncCursor: '',
+            syncStageStartedAt: null,
+          },
+          manager,
+        );
+      }
+    });
+
+    // TODO: Uncomment this when the email sync is implemented
+    // const messageChannels = await messageChannelRepository.find({
+    //   where: {
+    //     connectedAccountId: newOrExistingConnectedAccountId,
+    //   },
+    // });
+
+    // for (const messageChannel of messageChannels) {
+    //   await this.messageQueueService.add<MessagingMessageListFetchJobData>(
+    //     MessagingMessageListFetchJob.name,
+    //     {
+    //       workspaceId,
+    //       messageChannelId: messageChannel.id,
+    //     },
+    //   );
+    // }
+
+    const calendarChannels = await calendarChannelRepository.find({
+      where: {
+        connectedAccountId: newOrExistingConnectedAccountId,
+      },
+    });
+
+    for (const calendarChannel of calendarChannels) {
+      await this.calendarQueueService.add<CalendarEventListFetchJobData>(
+        CalendarEventListFetchJob.name,
+        {
+          calendarChannelId: calendarChannel.id,
+          workspaceId,
+        },
+      );
+    }
+  }
+}
diff --git a/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-common.auth.strategy.ts b/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-common.auth.strategy.ts
new file mode 100644
index 000000000000..8b506a98045c
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-common.auth.strategy.ts
@@ -0,0 +1,31 @@
+import { Injectable } from '@nestjs/common';
+import { PassportStrategy } from '@nestjs/passport';
+
+import { Strategy } from 'passport-microsoft';
+
+import { getMicrosoftApisOauthScopes } from 'src/engine/core-modules/auth/utils/get-microsoft-apis-oauth-scopes';
+import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+
+export type MicrosoftAPIScopeConfig = {
+  isCalendarEnabled?: boolean;
+  isMessagingAliasFetchingEnabled?: boolean;
+};
+
+@Injectable()
+export class MicrosoftAPIsOauthCommonStrategy extends PassportStrategy(
+  Strategy,
+  'microsoft-apis',
+) {
+  constructor(environmentService: EnvironmentService) {
+    const scopes = getMicrosoftApisOauthScopes();
+
+    super({
+      clientID: environmentService.get('AUTH_MICROSOFT_CLIENT_ID'),
+      clientSecret: environmentService.get('AUTH_MICROSOFT_CLIENT_SECRET'),
+      tenant: environmentService.get('AUTH_MICROSOFT_TENANT_ID'),
+      callbackURL: environmentService.get('AUTH_MICROSOFT_APIS_CALLBACK_URL'),
+      scope: scopes,
+      passReqToCallback: true,
+    });
+  }
+}
diff --git a/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-exchange-code-for-token.auth.strategy.ts b/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-exchange-code-for-token.auth.strategy.ts
new file mode 100644
index 000000000000..ef40f3311238
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-exchange-code-for-token.auth.strategy.ts
@@ -0,0 +1,48 @@
+import { Injectable } from '@nestjs/common';
+
+import { VerifyCallback } from 'passport-google-oauth20';
+
+import { MicrosoftAPIsOauthCommonStrategy } from 'src/engine/core-modules/auth/strategies/microsoft-apis-oauth-common.auth.strategy';
+import { MicrosoftAPIsRequest } from 'src/engine/core-modules/auth/types/microsoft-api-request.type';
+import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+
+export type MicrosoftAPIScopeConfig = {
+  isCalendarEnabled?: boolean;
+};
+
+@Injectable()
+export class MicrosoftAPIsOauthExchangeCodeForTokenStrategy extends MicrosoftAPIsOauthCommonStrategy {
+  constructor(environmentService: EnvironmentService) {
+    super(environmentService);
+  }
+
+  async validate(
+    request: MicrosoftAPIsRequest,
+    accessToken: string,
+    refreshToken: string,
+    profile: any,
+    done: VerifyCallback,
+  ): Promise<void> {
+    const { name, emails, photos } = profile;
+
+    const state =
+      typeof request.query.state === 'string'
+        ? JSON.parse(request.query.state)
+        : undefined;
+
+    const user: MicrosoftAPIsRequest['user'] = {
+      emails,
+      firstName: name.givenName,
+      lastName: name.familyName,
+      picture: photos?.[0]?.value,
+      accessToken,
+      refreshToken,
+      transientToken: state.transientToken,
+      redirectLocation: state.redirectLocation,
+      calendarVisibility: state.calendarVisibility,
+      messageVisibility: state.messageVisibility,
+    };
+
+    done(null, user);
+  }
+}
diff --git a/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-request-code.auth.strategy.ts b/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-request-code.auth.strategy.ts
new file mode 100644
index 000000000000..10ba1aeca5fb
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/strategies/microsoft-apis-oauth-request-code.auth.strategy.ts
@@ -0,0 +1,28 @@
+import { Injectable } from '@nestjs/common';
+
+import { MicrosoftAPIsOauthCommonStrategy } from 'src/engine/core-modules/auth/strategies/microsoft-apis-oauth-common.auth.strategy';
+import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+
+@Injectable()
+export class MicrosoftAPIsOauthRequestCodeStrategy extends MicrosoftAPIsOauthCommonStrategy {
+  constructor(environmentService: EnvironmentService) {
+    super(environmentService);
+  }
+
+  authenticate(req: any, options: any) {
+    options = {
+      ...options,
+      accessType: 'offline',
+      prompt: 'consent',
+      loginHint: req.params.loginHint,
+      state: JSON.stringify({
+        transientToken: req.params.transientToken,
+        redirectLocation: req.params.redirectLocation,
+        calendarVisibility: req.params.calendarVisibility,
+        messageVisibility: req.params.messageVisibility,
+      }),
+    };
+
+    return super.authenticate(req, options);
+  }
+}
diff --git a/packages/twenty-server/src/engine/core-modules/auth/types/microsoft-api-request.type.ts b/packages/twenty-server/src/engine/core-modules/auth/types/microsoft-api-request.type.ts
new file mode 100644
index 000000000000..6d6da36b24ba
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/types/microsoft-api-request.type.ts
@@ -0,0 +1,23 @@
+import { Request } from 'express';
+
+import { CalendarChannelVisibility } from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
+import { MessageChannelVisibility } from 'src/modules/messaging/common/standard-objects/message-channel.workspace-entity';
+
+export type MicrosoftAPIsRequest = Omit<
+  Request,
+  'user' | 'workspace' | 'workspaceMetadataVersion'
+> & {
+  user: {
+    firstName?: string | null;
+    lastName?: string | null;
+    emails: { value: string }[];
+    picture: string | null;
+    workspaceInviteHash?: string;
+    accessToken: string;
+    refreshToken: string;
+    transientToken: string;
+    redirectLocation?: string;
+    calendarVisibility?: CalendarChannelVisibility;
+    messageVisibility?: MessageChannelVisibility;
+  };
+};
diff --git a/packages/twenty-server/src/engine/core-modules/auth/utils/get-microsoft-apis-oauth-scopes.ts b/packages/twenty-server/src/engine/core-modules/auth/utils/get-microsoft-apis-oauth-scopes.ts
new file mode 100644
index 000000000000..e8353e88b5e5
--- /dev/null
+++ b/packages/twenty-server/src/engine/core-modules/auth/utils/get-microsoft-apis-oauth-scopes.ts
@@ -0,0 +1,12 @@
+export const getMicrosoftApisOauthScopes = () => {
+  const scopes = [
+    'openid',
+    'email',
+    'profile',
+    'offline_access',
+    'Mail.Read',
+    'Calendars.Read',
+  ];
+
+  return scopes;
+};
diff --git a/packages/twenty-server/src/engine/core-modules/environment/environment-variables.ts b/packages/twenty-server/src/engine/core-modules/environment/environment-variables.ts
index 89a075a030f2..a50ef428048b 100644
--- a/packages/twenty-server/src/engine/core-modules/environment/environment-variables.ts
+++ b/packages/twenty-server/src/engine/core-modules/environment/environment-variables.ts
@@ -201,6 +201,10 @@ export class EnvironmentVariables {
   @ValidateIf((env) => env.AUTH_MICROSOFT_ENABLED)
   AUTH_MICROSOFT_CALLBACK_URL: string;
 
+  @IsUrl({ require_tld: false })
+  @ValidateIf((env) => env.AUTH_MICROSOFT_ENABLED)
+  AUTH_MICROSOFT_APIS_CALLBACK_URL: string;
+
   @CastToBoolean()
   @IsOptional()
   @IsBoolean()
diff --git a/packages/twenty-server/src/engine/core-modules/feature-flag/enums/feature-flag-key.enum.ts b/packages/twenty-server/src/engine/core-modules/feature-flag/enums/feature-flag-key.enum.ts
index 2b2130548333..9bf22bc2a18e 100644
--- a/packages/twenty-server/src/engine/core-modules/feature-flag/enums/feature-flag-key.enum.ts
+++ b/packages/twenty-server/src/engine/core-modules/feature-flag/enums/feature-flag-key.enum.ts
@@ -14,5 +14,6 @@ export enum FeatureFlagKey {
   IsGmailSendEmailScopeEnabled = 'IS_GMAIL_SEND_EMAIL_SCOPE_ENABLED',
   IsAnalyticsV2Enabled = 'IS_ANALYTICS_V2_ENABLED',
   IsUniqueIndexesEnabled = 'IS_UNIQUE_INDEXES_ENABLED',
+  IsMicrosoftSyncEnabled = 'IS_MICROSOFT_SYNC_ENABLED',
   IsAdvancedFiltersEnabled = 'IS_ADVANCED_FILTERS_ENABLED',
 }
diff --git a/packages/twenty-server/src/engine/core-modules/user/user.resolver.ts b/packages/twenty-server/src/engine/core-modules/user/user.resolver.ts
index b7692671ee27..348204c6e2a0 100644
--- a/packages/twenty-server/src/engine/core-modules/user/user.resolver.ts
+++ b/packages/twenty-server/src/engine/core-modules/user/user.resolver.ts
@@ -35,7 +35,6 @@ import { AuthWorkspace } from 'src/engine/decorators/auth/auth-workspace.decorat
 import { DemoEnvGuard } from 'src/engine/guards/demo.env.guard';
 import { WorkspaceAuthGuard } from 'src/engine/guards/workspace-auth.guard';
 import { streamToBuffer } from 'src/utils/stream-to-buffer';
-import { isDefined } from 'src/utils/is-defined';
 
 const getHMACKey = (email?: string, key?: string | null) => {
   if (!email || !key) return null;
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/calendar-event-import-manager.module.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/calendar-event-import-manager.module.ts
index 0385ae884422..f318c947d0e8 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/calendar-event-import-manager.module.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/calendar-event-import-manager.module.ts
@@ -10,14 +10,19 @@ import { WorkspaceDataSourceModule } from 'src/engine/workspace-datasource/works
 import { BlocklistWorkspaceEntity } from 'src/modules/blocklist/standard-objects/blocklist.workspace-entity';
 import { CalendarEventCleanerModule } from 'src/modules/calendar/calendar-event-cleaner/calendar-event-cleaner.module';
 import { CalendarEventListFetchCronCommand } from 'src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-event-list-fetch.cron.command';
+import { CalendarEventsImportCronCommand } from 'src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-import.cron.command';
 import { CalendarOngoingStaleCronCommand } from 'src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-ongoing-stale.cron.command';
 import { CalendarEventListFetchCronJob } from 'src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-event-list-fetch.cron.job';
+import { CalendarEventsImportCronJob } from 'src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-events-import.cron.job';
 import { CalendarOngoingStaleCronJob } from 'src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-ongoing-stale.cron.job';
 import { GoogleCalendarDriverModule } from 'src/modules/calendar/calendar-event-import-manager/drivers/google-calendar/google-calendar-driver.module';
+import { MicrosoftCalendarDriverModule } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/microsoft-calendar-driver.module';
 import { CalendarEventListFetchJob } from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job';
+import { CalendarEventsImportJob } from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-events-import.job';
 import { CalendarOngoingStaleJob } from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-ongoing-stale.job';
 import { CalendarEventImportErrorHandlerService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-event-import-exception-handler.service';
 import { CalendarEventsImportService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service';
+import { CalendarFetchEventsService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service';
 import { CalendarGetCalendarEventsService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service';
 import { CalendarSaveEventsService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-save-events.service';
 import { CalendarEventParticipantManagerModule } from 'src/modules/calendar/calendar-event-participant-manager/calendar-event-participant-manager.module';
@@ -39,6 +44,7 @@ import { WorkspaceMemberWorkspaceEntity } from 'src/modules/workspace-member/sta
     WorkspaceDataSourceModule,
     CalendarEventCleanerModule,
     GoogleCalendarDriverModule,
+    MicrosoftCalendarDriverModule,
     BillingModule,
     RefreshAccessTokenManagerModule,
     CalendarEventParticipantManagerModule,
@@ -48,16 +54,20 @@ import { WorkspaceMemberWorkspaceEntity } from 'src/modules/workspace-member/sta
   providers: [
     CalendarChannelSyncStatusService,
     CalendarEventsImportService,
+    CalendarFetchEventsService,
     CalendarEventImportErrorHandlerService,
     CalendarGetCalendarEventsService,
     CalendarSaveEventsService,
     CalendarEventListFetchCronJob,
     CalendarEventListFetchCronCommand,
     CalendarEventListFetchJob,
+    CalendarEventsImportCronJob,
+    CalendarEventsImportCronCommand,
+    CalendarEventsImportJob,
     CalendarOngoingStaleCronJob,
     CalendarOngoingStaleCronCommand,
     CalendarOngoingStaleJob,
   ],
-  exports: [CalendarEventsImportService],
+  exports: [CalendarEventsImportService, CalendarFetchEventsService],
 })
 export class CalendarEventImportManagerModule {}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/constants/calendar-event-import-batch-size.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/constants/calendar-event-import-batch-size.ts
new file mode 100644
index 000000000000..a9d6e86b1b56
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/constants/calendar-event-import-batch-size.ts
@@ -0,0 +1 @@
+export const CALENDAR_EVENT_IMPORT_BATCH_SIZE = 100;
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-event-list-fetch.cron.command.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-event-list-fetch.cron.command.ts
index d49131893a42..7fce8ebdb4c4 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-event-list-fetch.cron.command.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-event-list-fetch.cron.command.ts
@@ -3,10 +3,8 @@ import { Command, CommandRunner } from 'nest-commander';
 import { InjectMessageQueue } from 'src/engine/core-modules/message-queue/decorators/message-queue.decorator';
 import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
 import { MessageQueueService } from 'src/engine/core-modules/message-queue/services/message-queue.service';
-import {
-  CALENDAR_EVENTS_IMPORT_CRON_PATTERN,
-  CalendarEventListFetchCronJob,
-} from 'src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-event-list-fetch.cron.job';
+import { CalendarEventListFetchCronJob } from 'src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-event-list-fetch.cron.job';
+import { CALENDAR_EVENTS_IMPORT_CRON_PATTERN } from 'src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-events-import.cron.job';
 
 @Command({
   name: 'cron:calendar:calendar-event-list-fetch',
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-import.cron.command.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-import.cron.command.ts
new file mode 100644
index 000000000000..a73bda1e983b
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/commands/calendar-import.cron.command.ts
@@ -0,0 +1,32 @@
+import { Command, CommandRunner } from 'nest-commander';
+
+import { InjectMessageQueue } from 'src/engine/core-modules/message-queue/decorators/message-queue.decorator';
+import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
+import { MessageQueueService } from 'src/engine/core-modules/message-queue/services/message-queue.service';
+import {
+  CALENDAR_EVENTS_IMPORT_CRON_PATTERN,
+  CalendarEventsImportCronJob,
+} from 'src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-events-import.cron.job';
+
+@Command({
+  name: 'cron:calendar:calendar-events-import',
+  description: 'Starts a cron job to import the calendar events',
+})
+export class CalendarEventsImportCronCommand extends CommandRunner {
+  constructor(
+    @InjectMessageQueue(MessageQueue.cronQueue)
+    private readonly messageQueueService: MessageQueueService,
+  ) {
+    super();
+  }
+
+  async run(): Promise<void> {
+    await this.messageQueueService.addCron<undefined>(
+      CalendarEventsImportCronJob.name,
+      undefined,
+      {
+        repeat: { pattern: CALENDAR_EVENTS_IMPORT_CRON_PATTERN },
+      },
+    );
+  }
+}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-event-list-fetch.cron.job.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-event-list-fetch.cron.job.ts
index d59e9db71dc0..d755b2cb984c 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-event-list-fetch.cron.job.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-event-list-fetch.cron.job.ts
@@ -16,11 +16,11 @@ import {
 import { TwentyORMGlobalManager } from 'src/engine/twenty-orm/twenty-orm-global.manager';
 import {
   CalendarEventListFetchJob,
-  CalendarEventsImportJobData,
+  CalendarEventListFetchJobData,
 } from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job';
 import { CalendarChannelSyncStage } from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
 
-export const CALENDAR_EVENTS_IMPORT_CRON_PATTERN = '*/5 * * * *';
+export const CALENDAR_EVENT_LIST_FETCH_CRON_PATTERN = '*/5 * * * *';
 
 @Processor({
   queueName: MessageQueue.cronQueue,
@@ -38,7 +38,7 @@ export class CalendarEventListFetchCronJob {
   @Process(CalendarEventListFetchCronJob.name)
   @SentryCronMonitor(
     CalendarEventListFetchCronJob.name,
-    CALENDAR_EVENTS_IMPORT_CRON_PATTERN,
+    CALENDAR_EVENT_LIST_FETCH_CRON_PATTERN,
   )
   async handle(): Promise<void> {
     console.time('CalendarEventListFetchCronJob time');
@@ -68,7 +68,7 @@ export class CalendarEventListFetchCronJob {
         });
 
         for (const calendarChannel of calendarChannels) {
-          await this.messageQueueService.add<CalendarEventsImportJobData>(
+          await this.messageQueueService.add<CalendarEventListFetchJobData>(
             CalendarEventListFetchJob.name,
             {
               calendarChannelId: calendarChannel.id,
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-events-import.cron.job.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-events-import.cron.job.ts
new file mode 100644
index 000000000000..8e9c02cb364b
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/crons/jobs/calendar-events-import.cron.job.ts
@@ -0,0 +1,87 @@
+import { InjectRepository } from '@nestjs/typeorm';
+
+import { Equal, Repository } from 'typeorm';
+
+import { SentryCronMonitor } from 'src/engine/core-modules/cron/sentry-cron-monitor.decorator';
+import { ExceptionHandlerService } from 'src/engine/core-modules/exception-handler/exception-handler.service';
+import { InjectMessageQueue } from 'src/engine/core-modules/message-queue/decorators/message-queue.decorator';
+import { Process } from 'src/engine/core-modules/message-queue/decorators/process.decorator';
+import { Processor } from 'src/engine/core-modules/message-queue/decorators/processor.decorator';
+import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
+import { MessageQueueService } from 'src/engine/core-modules/message-queue/services/message-queue.service';
+import {
+  Workspace,
+  WorkspaceActivationStatus,
+} from 'src/engine/core-modules/workspace/workspace.entity';
+import { TwentyORMGlobalManager } from 'src/engine/twenty-orm/twenty-orm-global.manager';
+import { CalendarEventListFetchJobData } from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job';
+import { CalendarEventsImportJob } from 'src/modules/calendar/calendar-event-import-manager/jobs/calendar-events-import.job';
+import { CalendarChannelSyncStage } from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
+
+export const CALENDAR_EVENTS_IMPORT_CRON_PATTERN = '*/1 * * * *';
+
+@Processor({
+  queueName: MessageQueue.cronQueue,
+})
+export class CalendarEventsImportCronJob {
+  constructor(
+    @InjectRepository(Workspace, 'core')
+    private readonly workspaceRepository: Repository<Workspace>,
+    @InjectMessageQueue(MessageQueue.calendarQueue)
+    private readonly messageQueueService: MessageQueueService,
+    private readonly twentyORMGlobalManager: TwentyORMGlobalManager,
+    private readonly exceptionHandlerService: ExceptionHandlerService,
+  ) {}
+
+  @Process(CalendarEventsImportCronJob.name)
+  @SentryCronMonitor(
+    CalendarEventsImportCronJob.name,
+    CALENDAR_EVENTS_IMPORT_CRON_PATTERN,
+  )
+  async handle(): Promise<void> {
+    console.time('CalendarEventsImportCronJob time');
+
+    const activeWorkspaces = await this.workspaceRepository.find({
+      where: {
+        activationStatus: WorkspaceActivationStatus.ACTIVE,
+      },
+    });
+
+    for (const activeWorkspace of activeWorkspaces) {
+      try {
+        const calendarChannelRepository =
+          await this.twentyORMGlobalManager.getRepositoryForWorkspace(
+            activeWorkspace.id,
+            'calendarChannel',
+          );
+
+        const calendarChannels = await calendarChannelRepository.find({
+          where: {
+            isSyncEnabled: true,
+            syncStage: Equal(
+              CalendarChannelSyncStage.CALENDAR_EVENTS_IMPORT_PENDING,
+            ),
+          },
+        });
+
+        for (const calendarChannel of calendarChannels) {
+          await this.messageQueueService.add<CalendarEventListFetchJobData>(
+            CalendarEventsImportJob.name,
+            {
+              calendarChannelId: calendarChannel.id,
+              workspaceId: activeWorkspace.id,
+            },
+          );
+        }
+      } catch (error) {
+        this.exceptionHandlerService.captureExceptions([error], {
+          user: {
+            workspaceId: activeWorkspace.id,
+          },
+        });
+      }
+    }
+
+    console.timeEnd('CalendarEventsImportCronJob time');
+  }
+}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/google-calendar/services/google-calendar-get-events.service.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/google-calendar/services/google-calendar-get-events.service.ts
index a140b8bfbf74..c540a8b556e1 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/google-calendar/services/google-calendar-get-events.service.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/google-calendar/services/google-calendar-get-events.service.ts
@@ -72,6 +72,7 @@ export class GoogleCalendarGetEventsService {
     }
 
     return {
+      fullEvents: true,
       calendarEvents: formatGoogleCalendarEvents(events),
       nextSyncCursor: nextSyncToken || '',
     };
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/microsoft-calendar-driver.module.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/microsoft-calendar-driver.module.ts
new file mode 100644
index 000000000000..def97bfb69af
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/microsoft-calendar-driver.module.ts
@@ -0,0 +1,20 @@
+import { Module } from '@nestjs/common';
+
+import { EnvironmentModule } from 'src/engine/core-modules/environment/environment.module';
+import { MicrosoftCalendarGetEventsService } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-get-events.service';
+import { MicrosoftCalendarImportEventsService } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-import-events.service';
+import { MicrosoftOAuth2ClientManagerService } from 'src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service';
+
+@Module({
+  imports: [EnvironmentModule],
+  providers: [
+    MicrosoftCalendarGetEventsService,
+    MicrosoftCalendarImportEventsService,
+    MicrosoftOAuth2ClientManagerService,
+  ],
+  exports: [
+    MicrosoftCalendarGetEventsService,
+    MicrosoftCalendarImportEventsService,
+  ],
+})
+export class MicrosoftCalendarDriverModule {}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-get-events.service.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-get-events.service.ts
new file mode 100644
index 000000000000..ce9da85552da
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-get-events.service.ts
@@ -0,0 +1,62 @@
+import { Injectable } from '@nestjs/common';
+
+import {
+  PageCollection,
+  PageIterator,
+  PageIteratorCallback,
+} from '@microsoft/microsoft-graph-client';
+
+import { parseMicrosoftCalendarError } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/parse-microsoft-calendar-error.util';
+import { GetCalendarEventsResponse } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service';
+import { MicrosoftOAuth2ClientManagerService } from 'src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service';
+import { ConnectedAccountWorkspaceEntity } from 'src/modules/connected-account/standard-objects/connected-account.workspace-entity';
+
+@Injectable()
+export class MicrosoftCalendarGetEventsService {
+  constructor(
+    private readonly microsoftOAuth2ClientManagerService: MicrosoftOAuth2ClientManagerService,
+  ) {}
+
+  public async getCalendarEvents(
+    connectedAccount: Pick<
+      ConnectedAccountWorkspaceEntity,
+      'provider' | 'refreshToken' | 'id'
+    >,
+    syncCursor?: string,
+  ): Promise<GetCalendarEventsResponse> {
+    try {
+      const microsoftClient =
+        await this.microsoftOAuth2ClientManagerService.getOAuth2Client(
+          connectedAccount.refreshToken,
+        );
+      const eventIds: string[] = [];
+
+      const response: PageCollection = await microsoftClient
+        .api(syncCursor || '/me/calendar/events/delta')
+        .version('beta')
+        .get();
+
+      const callback: PageIteratorCallback = (data) => {
+        eventIds.push(data.id);
+
+        return true;
+      };
+
+      const pageIterator = new PageIterator(
+        microsoftClient,
+        response,
+        callback,
+      );
+
+      await pageIterator.iterate();
+
+      return {
+        fullEvents: false,
+        calendarEventIds: eventIds,
+        nextSyncCursor: pageIterator.getDeltaLink() || '',
+      };
+    } catch (error) {
+      throw parseMicrosoftCalendarError(error);
+    }
+  }
+}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-import-events.service.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-import-events.service.ts
new file mode 100644
index 000000000000..7f6ac5223143
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-import-events.service.ts
@@ -0,0 +1,45 @@
+import { Injectable } from '@nestjs/common';
+
+import { Event } from '@microsoft/microsoft-graph-types';
+
+import { formatMicrosoftCalendarEvents } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/format-microsoft-calendar-event.util';
+import { parseMicrosoftCalendarError } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/parse-microsoft-calendar-error.util';
+import { CalendarEventWithParticipants } from 'src/modules/calendar/common/types/calendar-event';
+import { MicrosoftOAuth2ClientManagerService } from 'src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service';
+import { ConnectedAccountWorkspaceEntity } from 'src/modules/connected-account/standard-objects/connected-account.workspace-entity';
+
+@Injectable()
+export class MicrosoftCalendarImportEventsService {
+  constructor(
+    private readonly microsoftOAuth2ClientManagerService: MicrosoftOAuth2ClientManagerService,
+  ) {}
+
+  public async getCalendarEvents(
+    connectedAccount: Pick<
+      ConnectedAccountWorkspaceEntity,
+      'provider' | 'refreshToken' | 'id'
+    >,
+    changedEventIds: string[],
+  ): Promise<CalendarEventWithParticipants[]> {
+    try {
+      const microsoftClient =
+        await this.microsoftOAuth2ClientManagerService.getOAuth2Client(
+          connectedAccount.refreshToken,
+        );
+
+      const events: Event[] = [];
+
+      for (const changedEventId of changedEventIds) {
+        const event = await microsoftClient
+          .api(`/me/calendar/events/${changedEventId}`)
+          .get();
+
+        events.push(event);
+      }
+
+      return formatMicrosoftCalendarEvents(events);
+    } catch (error) {
+      throw parseMicrosoftCalendarError(error);
+    }
+  }
+}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/format-microsoft-calendar-event.util.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/format-microsoft-calendar-event.util.ts
new file mode 100644
index 000000000000..a0085bff209b
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/format-microsoft-calendar-event.util.ts
@@ -0,0 +1,60 @@
+import {
+  Event,
+  NullableOption,
+  ResponseType,
+} from '@microsoft/microsoft-graph-types';
+
+import { CalendarEventParticipantResponseStatus } from 'src/modules/calendar/common/standard-objects/calendar-event-participant.workspace-entity';
+import { CalendarEventWithParticipants } from 'src/modules/calendar/common/types/calendar-event';
+
+export const formatMicrosoftCalendarEvents = (
+  events: Event[],
+): CalendarEventWithParticipants[] => {
+  return events.map(formatMicrosoftCalendarEvent);
+};
+
+const formatMicrosoftCalendarEvent = (
+  event: Event,
+): CalendarEventWithParticipants => {
+  const formatResponseStatus = (
+    status: NullableOption<ResponseType> | undefined,
+  ) => {
+    switch (status) {
+      case 'accepted':
+      case 'organizer':
+        return CalendarEventParticipantResponseStatus.ACCEPTED;
+      case 'declined':
+        return CalendarEventParticipantResponseStatus.DECLINED;
+      case 'tentativelyAccepted':
+        return CalendarEventParticipantResponseStatus.TENTATIVE;
+      default:
+        return CalendarEventParticipantResponseStatus.NEEDS_ACTION;
+    }
+  };
+
+  return {
+    title: event.subject ?? '',
+    isCanceled: !!event.isCancelled,
+    isFullDay: !!event.isAllDay,
+    startsAt: event.start?.dateTime ?? null,
+    endsAt: event.end?.dateTime ?? null,
+    externalId: event.id ?? '',
+    externalCreatedAt: event.createdDateTime ?? null,
+    externalUpdatedAt: event.lastModifiedDateTime ?? null,
+    description: event.body?.content ?? '',
+    location: event.location?.displayName ?? '',
+    iCalUID: event.iCalUId ?? '',
+    conferenceSolution: event.onlineMeetingProvider ?? '',
+    conferenceLinkLabel: event.onlineMeeting?.joinUrl ?? '',
+    conferenceLinkUrl: event.onlineMeeting?.joinUrl ?? '',
+    recurringEventExternalId: event.id ?? '',
+    participants:
+      event.attendees?.map((attendee) => ({
+        handle: attendee.emailAddress?.address ?? '',
+        displayName: attendee.emailAddress?.name ?? '',
+        isOrganizer: attendee.status?.response === 'organizer',
+        responseStatus: formatResponseStatus(attendee.status?.response),
+      })) ?? [],
+    status: '',
+  };
+};
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/parse-microsoft-calendar-error.util.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/parse-microsoft-calendar-error.util.ts
new file mode 100644
index 000000000000..78ed9024bfc9
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/utils/parse-microsoft-calendar-error.util.ts
@@ -0,0 +1,65 @@
+import { GraphError } from '@microsoft/microsoft-graph-client';
+
+import {
+  CalendarEventImportDriverException,
+  CalendarEventImportDriverExceptionCode,
+} from 'src/modules/calendar/calendar-event-import-manager/drivers/exceptions/calendar-event-import-driver.exception';
+
+export const parseMicrosoftCalendarError = (
+  error: GraphError,
+): CalendarEventImportDriverException => {
+  const { statusCode, message } = error;
+
+  switch (statusCode) {
+    case 400:
+      return new CalendarEventImportDriverException(
+        message,
+        CalendarEventImportDriverExceptionCode.UNKNOWN,
+      );
+
+    case 404:
+      if (
+        message ==
+        'The mailbox is either inactive, soft-deleted, or is hosted on-premise.'
+      ) {
+        return new CalendarEventImportDriverException(
+          message,
+          CalendarEventImportDriverExceptionCode.INSUFFICIENT_PERMISSIONS,
+        );
+      }
+
+      return new CalendarEventImportDriverException(
+        message,
+        CalendarEventImportDriverExceptionCode.NOT_FOUND,
+      );
+
+    case 429:
+      return new CalendarEventImportDriverException(
+        message,
+        CalendarEventImportDriverExceptionCode.TEMPORARY_ERROR,
+      );
+
+    case 403:
+      return new CalendarEventImportDriverException(
+        message,
+        CalendarEventImportDriverExceptionCode.INSUFFICIENT_PERMISSIONS,
+      );
+
+    case 401:
+      return new CalendarEventImportDriverException(
+        message,
+        CalendarEventImportDriverExceptionCode.INSUFFICIENT_PERMISSIONS,
+      );
+    case 500:
+      return new CalendarEventImportDriverException(
+        message,
+        CalendarEventImportDriverExceptionCode.UNKNOWN,
+      );
+
+    default:
+      return new CalendarEventImportDriverException(
+        message,
+        CalendarEventImportDriverExceptionCode.UNKNOWN,
+      );
+  }
+};
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job.ts
index 1e28927e25b8..30fdda2f6ae3 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-event-list-fetch.job.ts
@@ -4,14 +4,14 @@ import { Process } from 'src/engine/core-modules/message-queue/decorators/proces
 import { Processor } from 'src/engine/core-modules/message-queue/decorators/processor.decorator';
 import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
 import { TwentyORMManager } from 'src/engine/twenty-orm/twenty-orm.manager';
-import { CalendarEventsImportService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service';
+import { CalendarFetchEventsService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service';
 import {
   CalendarChannelSyncStage,
   CalendarChannelWorkspaceEntity,
 } from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
 import { isThrottled } from 'src/modules/connected-account/utils/is-throttled';
 
-export type CalendarEventsImportJobData = {
+export type CalendarEventListFetchJobData = {
   calendarChannelId: string;
   workspaceId: string;
 };
@@ -23,11 +23,11 @@ export type CalendarEventsImportJobData = {
 export class CalendarEventListFetchJob {
   constructor(
     private readonly twentyORMManager: TwentyORMManager,
-    private readonly calendarEventsImportService: CalendarEventsImportService,
+    private readonly calendarFetchEventsService: CalendarFetchEventsService,
   ) {}
 
   @Process(CalendarEventListFetchJob.name)
-  async handle(data: CalendarEventsImportJobData): Promise<void> {
+  async handle(data: CalendarEventListFetchJobData): Promise<void> {
     console.time('CalendarEventListFetchJob time');
 
     const { workspaceId, calendarChannelId } = data;
@@ -65,7 +65,7 @@ export class CalendarEventListFetchJob {
           syncStageStartedAt: null,
         });
 
-        await this.calendarEventsImportService.processCalendarEventsImport(
+        await this.calendarFetchEventsService.fetchCalendarEvents(
           calendarChannel,
           calendarChannel.connectedAccount,
           workspaceId,
@@ -73,7 +73,7 @@ export class CalendarEventListFetchJob {
         break;
 
       case CalendarChannelSyncStage.PARTIAL_CALENDAR_EVENT_LIST_FETCH_PENDING:
-        await this.calendarEventsImportService.processCalendarEventsImport(
+        await this.calendarFetchEventsService.fetchCalendarEvents(
           calendarChannel,
           calendarChannel.connectedAccount,
           workspaceId,
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-events-import.job.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-events-import.job.ts
new file mode 100644
index 000000000000..d99607501f5b
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/jobs/calendar-events-import.job.ts
@@ -0,0 +1,75 @@
+import { Scope } from '@nestjs/common';
+
+import { Process } from 'src/engine/core-modules/message-queue/decorators/process.decorator';
+import { Processor } from 'src/engine/core-modules/message-queue/decorators/processor.decorator';
+import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
+import { TwentyORMManager } from 'src/engine/twenty-orm/twenty-orm.manager';
+import { CalendarEventsImportService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service';
+import {
+  CalendarChannelSyncStage,
+  CalendarChannelWorkspaceEntity,
+} from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
+import { isThrottled } from 'src/modules/connected-account/utils/is-throttled';
+
+export type CalendarEventsImportJobData = {
+  calendarChannelId: string;
+  workspaceId: string;
+};
+
+@Processor({
+  queueName: MessageQueue.calendarQueue,
+  scope: Scope.REQUEST,
+})
+export class CalendarEventsImportJob {
+  constructor(
+    private readonly calendarEventsImportService: CalendarEventsImportService,
+    private readonly twentyORMManager: TwentyORMManager,
+  ) {}
+
+  @Process(CalendarEventsImportJob.name)
+  async handle(data: CalendarEventsImportJobData): Promise<void> {
+    console.time('CalendarEventsImportJob time');
+
+    const { calendarChannelId, workspaceId } = data;
+
+    const calendarChannelRepository =
+      await this.twentyORMManager.getRepository<CalendarChannelWorkspaceEntity>(
+        'calendarChannel',
+      );
+    const calendarChannel = await calendarChannelRepository.findOne({
+      where: {
+        id: calendarChannelId,
+        isSyncEnabled: true,
+      },
+      relations: ['connectedAccount'],
+    });
+
+    if (!calendarChannel?.isSyncEnabled) {
+      return;
+    }
+
+    if (
+      isThrottled(
+        calendarChannel.syncStageStartedAt,
+        calendarChannel.throttleFailureCount,
+      )
+    ) {
+      return;
+    }
+
+    if (
+      calendarChannel.syncStage !==
+      CalendarChannelSyncStage.CALENDAR_EVENTS_IMPORT_PENDING
+    ) {
+      return;
+    }
+
+    await this.calendarEventsImportService.processCalendarEventsImport(
+      calendarChannel,
+      calendarChannel.connectedAccount,
+      workspaceId,
+    );
+
+    console.timeEnd('CalendarEventsImportJob time');
+  }
+}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service.ts
index 0dd215b88857..826a73a8242f 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service.ts
@@ -2,84 +2,86 @@ import { Injectable } from '@nestjs/common';
 
 import { Any } from 'typeorm';
 
+import { InjectCacheStorage } from 'src/engine/core-modules/cache-storage/decorators/cache-storage.decorator';
+import { CacheStorageService } from 'src/engine/core-modules/cache-storage/services/cache-storage.service';
+import { CacheStorageNamespace } from 'src/engine/core-modules/cache-storage/types/cache-storage-namespace.enum';
 import { InjectObjectMetadataRepository } from 'src/engine/object-metadata-repository/object-metadata-repository.decorator';
 import { TwentyORMManager } from 'src/engine/twenty-orm/twenty-orm.manager';
 import { BlocklistRepository } from 'src/modules/blocklist/repositories/blocklist.repository';
 import { BlocklistWorkspaceEntity } from 'src/modules/blocklist/standard-objects/blocklist.workspace-entity';
 import { CalendarEventCleanerService } from 'src/modules/calendar/calendar-event-cleaner/services/calendar-event-cleaner.service';
+import { CALENDAR_EVENT_IMPORT_BATCH_SIZE } from 'src/modules/calendar/calendar-event-import-manager/constants/calendar-event-import-batch-size';
+import { MicrosoftCalendarImportEventsService } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-import-events.service';
 import {
   CalendarEventImportErrorHandlerService,
   CalendarEventImportSyncStep,
 } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-event-import-exception-handler.service';
-import {
-  CalendarGetCalendarEventsService,
-  GetCalendarEventsResponse,
-} from 'src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service';
 import { CalendarSaveEventsService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-save-events.service';
 import { filterEventsAndReturnCancelledEvents } from 'src/modules/calendar/calendar-event-import-manager/utils/filter-events.util';
 import { CalendarChannelSyncStatusService } from 'src/modules/calendar/common/services/calendar-channel-sync-status.service';
 import { CalendarChannelEventAssociationWorkspaceEntity } from 'src/modules/calendar/common/standard-objects/calendar-channel-event-association.workspace-entity';
-import {
-  CalendarChannelSyncStage,
-  CalendarChannelWorkspaceEntity,
-} from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
+import { CalendarChannelWorkspaceEntity } from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
+import { CalendarEventWithParticipants } from 'src/modules/calendar/common/types/calendar-event';
 import { ConnectedAccountWorkspaceEntity } from 'src/modules/connected-account/standard-objects/connected-account.workspace-entity';
 
 @Injectable()
 export class CalendarEventsImportService {
   constructor(
+    @InjectCacheStorage(CacheStorageNamespace.ModuleCalendar)
+    private readonly cacheStorage: CacheStorageService,
     private readonly twentyORMManager: TwentyORMManager,
     @InjectObjectMetadataRepository(BlocklistWorkspaceEntity)
     private readonly blocklistRepository: BlocklistRepository,
     private readonly calendarEventCleanerService: CalendarEventCleanerService,
     private readonly calendarChannelSyncStatusService: CalendarChannelSyncStatusService,
-    private readonly getCalendarEventsService: CalendarGetCalendarEventsService,
     private readonly calendarSaveEventsService: CalendarSaveEventsService,
     private readonly calendarEventImportErrorHandlerService: CalendarEventImportErrorHandlerService,
+    private readonly microsoftCalendarImportEventService: MicrosoftCalendarImportEventsService,
   ) {}
 
   public async processCalendarEventsImport(
     calendarChannel: CalendarChannelWorkspaceEntity,
     connectedAccount: ConnectedAccountWorkspaceEntity,
     workspaceId: string,
+    fetchedCalendarEvents?: CalendarEventWithParticipants[],
   ): Promise<void> {
-    const syncStep =
-      calendarChannel.syncStage ===
-      CalendarChannelSyncStage.FULL_CALENDAR_EVENT_LIST_FETCH_PENDING
-        ? CalendarEventImportSyncStep.FULL_CALENDAR_EVENT_LIST_FETCH
-        : CalendarEventImportSyncStep.PARTIAL_CALENDAR_EVENT_LIST_FETCH;
-
-    await this.calendarChannelSyncStatusService.markAsCalendarEventListFetchOngoing(
+    await this.calendarChannelSyncStatusService.markAsCalendarEventsImportOngoing(
       [calendarChannel.id],
     );
-    let calendarEvents: GetCalendarEventsResponse['calendarEvents'] = [];
-    let nextSyncCursor: GetCalendarEventsResponse['nextSyncCursor'] = '';
+
+    let calendarEvents: CalendarEventWithParticipants[] = [];
 
     try {
-      const getCalendarEventsResponse =
-        await this.getCalendarEventsService.getCalendarEvents(
-          connectedAccount,
-          calendarChannel.syncCursor,
+      if (fetchedCalendarEvents) {
+        calendarEvents = fetchedCalendarEvents;
+      } else {
+        const eventIdsToFetch: string[] = await this.cacheStorage.setPop(
+          `calendar-events-to-import:${workspaceId}:${calendarChannel.id}`,
+          CALENDAR_EVENT_IMPORT_BATCH_SIZE,
         );
 
-      calendarEvents = getCalendarEventsResponse.calendarEvents;
-      nextSyncCursor = getCalendarEventsResponse.nextSyncCursor;
-
-      const calendarChannelRepository =
-        await this.twentyORMManager.getRepository<CalendarChannelWorkspaceEntity>(
-          'calendarChannel',
-        );
+        if (!eventIdsToFetch || eventIdsToFetch.length === 0) {
+          await this.calendarChannelSyncStatusService.markAsCompletedAndSchedulePartialCalendarEventListFetch(
+            [calendarChannel.id],
+          );
+
+          return;
+        }
+
+        switch (connectedAccount.provider) {
+          case 'microsoft':
+            calendarEvents =
+              await this.microsoftCalendarImportEventService.getCalendarEvents(
+                connectedAccount,
+                eventIdsToFetch,
+              );
+            break;
+          default:
+            break;
+        }
+      }
 
       if (!calendarEvents || calendarEvents?.length === 0) {
-        await calendarChannelRepository.update(
-          {
-            id: calendarChannel.id,
-          },
-          {
-            syncCursor: nextSyncCursor,
-          },
-        );
-
         await this.calendarChannelSyncStatusService.schedulePartialCalendarEventListFetch(
           [calendarChannel.id],
         );
@@ -127,22 +129,13 @@ export class CalendarEventsImportService {
         workspaceId,
       );
 
-      await calendarChannelRepository.update(
-        {
-          id: calendarChannel.id,
-        },
-        {
-          syncCursor: nextSyncCursor,
-        },
-      );
-
       await this.calendarChannelSyncStatusService.markAsCompletedAndSchedulePartialCalendarEventListFetch(
         [calendarChannel.id],
       );
     } catch (error) {
       await this.calendarEventImportErrorHandlerService.handleDriverException(
         error,
-        syncStep,
+        CalendarEventImportSyncStep.CALENDAR_EVENTS_IMPORT,
         calendarChannel,
         workspaceId,
       );
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service.ts
new file mode 100644
index 000000000000..08853023739a
--- /dev/null
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-fetch-events.service.ts
@@ -0,0 +1,129 @@
+import { Injectable } from '@nestjs/common';
+
+import { InjectCacheStorage } from 'src/engine/core-modules/cache-storage/decorators/cache-storage.decorator';
+import { CacheStorageService } from 'src/engine/core-modules/cache-storage/services/cache-storage.service';
+import { CacheStorageNamespace } from 'src/engine/core-modules/cache-storage/types/cache-storage-namespace.enum';
+import { TwentyORMManager } from 'src/engine/twenty-orm/twenty-orm.manager';
+import {
+  CalendarEventImportDriverException,
+  CalendarEventImportDriverExceptionCode,
+} from 'src/modules/calendar/calendar-event-import-manager/drivers/exceptions/calendar-event-import-driver.exception';
+import {
+  CalendarEventImportErrorHandlerService,
+  CalendarEventImportSyncStep,
+} from 'src/modules/calendar/calendar-event-import-manager/services/calendar-event-import-exception-handler.service';
+import { CalendarEventsImportService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-events-import.service';
+import { CalendarGetCalendarEventsService } from 'src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service';
+import { CalendarChannelSyncStatusService } from 'src/modules/calendar/common/services/calendar-channel-sync-status.service';
+import {
+  CalendarChannelSyncStage,
+  CalendarChannelWorkspaceEntity,
+} from 'src/modules/calendar/common/standard-objects/calendar-channel.workspace-entity';
+import { ConnectedAccountWorkspaceEntity } from 'src/modules/connected-account/standard-objects/connected-account.workspace-entity';
+
+@Injectable()
+export class CalendarFetchEventsService {
+  constructor(
+    @InjectCacheStorage(CacheStorageNamespace.ModuleCalendar)
+    private readonly cacheStorage: CacheStorageService,
+    private readonly twentyORMManager: TwentyORMManager,
+    private readonly calendarChannelSyncStatusService: CalendarChannelSyncStatusService,
+    private readonly getCalendarEventsService: CalendarGetCalendarEventsService,
+    private readonly calendarEventImportErrorHandlerService: CalendarEventImportErrorHandlerService,
+    private readonly calendarEventsImportService: CalendarEventsImportService,
+  ) {}
+
+  public async fetchCalendarEvents(
+    calendarChannel: CalendarChannelWorkspaceEntity,
+    connectedAccount: ConnectedAccountWorkspaceEntity,
+    workspaceId: string,
+  ): Promise<void> {
+    const syncStep =
+      calendarChannel.syncStage ===
+      CalendarChannelSyncStage.FULL_CALENDAR_EVENT_LIST_FETCH_PENDING
+        ? CalendarEventImportSyncStep.FULL_CALENDAR_EVENT_LIST_FETCH
+        : CalendarEventImportSyncStep.PARTIAL_CALENDAR_EVENT_LIST_FETCH;
+
+    await this.calendarChannelSyncStatusService.markAsCalendarEventListFetchOngoing(
+      [calendarChannel.id],
+    );
+
+    try {
+      const getCalendarEventsResponse =
+        await this.getCalendarEventsService.getCalendarEvents(
+          connectedAccount,
+          calendarChannel.syncCursor,
+        );
+
+      const hasFullEvents = getCalendarEventsResponse.fullEvents;
+
+      const calendarEvents = hasFullEvents
+        ? getCalendarEventsResponse.calendarEvents
+        : null;
+      const calendarEventIds = getCalendarEventsResponse.calendarEventIds;
+      const nextSyncCursor = getCalendarEventsResponse.nextSyncCursor;
+
+      const calendarChannelRepository =
+        await this.twentyORMManager.getRepository<CalendarChannelWorkspaceEntity>(
+          'calendarChannel',
+        );
+
+      if (!calendarEvents || calendarEvents?.length === 0) {
+        await calendarChannelRepository.update(
+          {
+            id: calendarChannel.id,
+          },
+          {
+            syncCursor: nextSyncCursor,
+          },
+        );
+
+        await this.calendarChannelSyncStatusService.schedulePartialCalendarEventListFetch(
+          [calendarChannel.id],
+        );
+      }
+
+      await calendarChannelRepository.update(
+        {
+          id: calendarChannel.id,
+        },
+        {
+          syncCursor: nextSyncCursor,
+        },
+      );
+
+      if (hasFullEvents && calendarEvents) {
+        // Event Import already done
+        await this.calendarEventsImportService.processCalendarEventsImport(
+          calendarChannel,
+          connectedAccount,
+          workspaceId,
+          calendarEvents,
+        );
+      } else if (!hasFullEvents && calendarEventIds) {
+        // Event Import still needed
+
+        await this.cacheStorage.setAdd(
+          `calendar-events-to-import:${workspaceId}:${calendarChannel.id}`,
+          calendarEventIds,
+        );
+
+        await this.calendarChannelSyncStatusService.scheduleCalendarEventsImport(
+          [calendarChannel.id],
+        );
+      } else {
+        throw new CalendarEventImportDriverException(
+          "Expected 'calendarEvents' or 'calendarEventIds' to be present",
+          CalendarEventImportDriverExceptionCode.UNKNOWN,
+        );
+      }
+    } catch (error) {
+      await this.calendarEventImportErrorHandlerService.handleDriverException(
+        error,
+        syncStep,
+        calendarChannel,
+        workspaceId,
+      );
+    }
+  }
+}
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service.ts
index 8bee58bd4b7f..6704fa3555a8 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/services/calendar-get-events.service.ts
@@ -1,6 +1,7 @@
 import { Injectable } from '@nestjs/common';
 
-import { GoogleCalendarGetEventsService as GoogleCalendarGetCalendarEventsService } from 'src/modules/calendar/calendar-event-import-manager/drivers/google-calendar/services/google-calendar-get-events.service';
+import { GoogleCalendarGetEventsService } from 'src/modules/calendar/calendar-event-import-manager/drivers/google-calendar/services/google-calendar-get-events.service';
+import { MicrosoftCalendarGetEventsService } from 'src/modules/calendar/calendar-event-import-manager/drivers/microsoft-calendar/services/microsoft-calendar-get-events.service';
 import {
   CalendarEventImportException,
   CalendarEventImportExceptionCode,
@@ -9,14 +10,17 @@ import { CalendarEventWithParticipants } from 'src/modules/calendar/common/types
 import { ConnectedAccountWorkspaceEntity } from 'src/modules/connected-account/standard-objects/connected-account.workspace-entity';
 
 export type GetCalendarEventsResponse = {
-  calendarEvents: CalendarEventWithParticipants[];
+  fullEvents: boolean;
+  calendarEvents?: CalendarEventWithParticipants[];
+  calendarEventIds?: string[];
   nextSyncCursor: string;
 };
 
 @Injectable()
 export class CalendarGetCalendarEventsService {
   constructor(
-    private readonly googleCalendarGetCalendarEventsService: GoogleCalendarGetCalendarEventsService,
+    private readonly googleCalendarGetEventsService: GoogleCalendarGetEventsService,
+    private readonly microsoftCalendarGetEventsService: MicrosoftCalendarGetEventsService,
   ) {}
 
   public async getCalendarEvents(
@@ -28,7 +32,12 @@ export class CalendarGetCalendarEventsService {
   ): Promise<GetCalendarEventsResponse> {
     switch (connectedAccount.provider) {
       case 'google':
-        return this.googleCalendarGetCalendarEventsService.getCalendarEvents(
+        return this.googleCalendarGetEventsService.getCalendarEvents(
+          connectedAccount,
+          syncCursor,
+        );
+      case 'microsoft':
+        return this.microsoftCalendarGetEventsService.getCalendarEvents(
           connectedAccount,
           syncCursor,
         );
diff --git a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/utils/filter-events.util.ts b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/utils/filter-events.util.ts
index 2cc28f3a09b7..d705f81c0b3e 100644
--- a/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/utils/filter-events.util.ts
+++ b/packages/twenty-server/src/modules/calendar/calendar-event-import-manager/utils/filter-events.util.ts
@@ -23,7 +23,7 @@ export const filterEventsAndReturnCancelledEvents = (
       },
       event,
     ) => {
-      if (event.status === 'cancelled') {
+      if (event.isCanceled) {
         acc.cancelledEvents.push(event);
       } else {
         acc.filteredEvents.push(event);
diff --git a/packages/twenty-server/src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service.ts b/packages/twenty-server/src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service.ts
new file mode 100644
index 000000000000..b14bb1f82683
--- /dev/null
+++ b/packages/twenty-server/src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service.ts
@@ -0,0 +1,62 @@
+import { Injectable } from '@nestjs/common';
+
+import {
+  AuthProvider,
+  AuthProviderCallback,
+  Client,
+} from '@microsoft/microsoft-graph-client';
+
+import { EnvironmentService } from 'src/engine/core-modules/environment/environment.service';
+
+@Injectable()
+export class MicrosoftOAuth2ClientManagerService {
+  constructor(private readonly environmentService: EnvironmentService) {}
+
+  public async getOAuth2Client(refreshToken: string): Promise<Client> {
+    const authProvider: AuthProvider = async (
+      callback: AuthProviderCallback,
+    ) => {
+      try {
+        const tenantId = this.environmentService.get(
+          'AUTH_MICROSOFT_TENANT_ID',
+        );
+
+        const urlData = new URLSearchParams();
+
+        urlData.append(
+          'client_id',
+          this.environmentService.get('AUTH_MICROSOFT_CLIENT_ID'),
+        );
+        urlData.append('scope', 'https://graph.microsoft.com/.default');
+        urlData.append('refresh_token', refreshToken);
+        urlData.append(
+          'client_secret',
+          this.environmentService.get('AUTH_MICROSOFT_CLIENT_SECRET'),
+        );
+        urlData.append('grant_type', 'refresh_token');
+
+        const res = await fetch(
+          `https://login.microsoftonline.com/${tenantId}/oauth2/v2.0/token`,
+          {
+            method: 'POST',
+            body: urlData,
+          },
+        );
+
+        const data = await res.json();
+
+        callback(null, data.access_token);
+      } catch (error) {
+        callback(error, null);
+      }
+    };
+
+    const client = Client.init({
+      defaultVersion: 'v1.0',
+      debugLogging: false,
+      authProvider: authProvider,
+    });
+
+    return client;
+  }
+}
diff --git a/packages/twenty-server/src/modules/connected-account/oauth2-client-manager/oauth2-client-manager.module.ts b/packages/twenty-server/src/modules/connected-account/oauth2-client-manager/oauth2-client-manager.module.ts
index 23c65eba1157..c70acc33fa42 100644
--- a/packages/twenty-server/src/modules/connected-account/oauth2-client-manager/oauth2-client-manager.module.ts
+++ b/packages/twenty-server/src/modules/connected-account/oauth2-client-manager/oauth2-client-manager.module.ts
@@ -1,11 +1,16 @@
 import { Module } from '@nestjs/common';
 
 import { GoogleOAuth2ClientManagerService } from 'src/modules/connected-account/oauth2-client-manager/drivers/google/google-oauth2-client-manager.service';
+import { MicrosoftOAuth2ClientManagerService } from 'src/modules/connected-account/oauth2-client-manager/drivers/microsoft/microsoft-oauth2-client-manager.service';
 import { OAuth2ClientManagerService } from 'src/modules/connected-account/oauth2-client-manager/services/oauth2-client-manager.service';
 
 @Module({
   imports: [],
-  providers: [OAuth2ClientManagerService, GoogleOAuth2ClientManagerService],
-  exports: [OAuth2ClientManagerService],
+  providers: [
+    OAuth2ClientManagerService,
+    GoogleOAuth2ClientManagerService,
+    MicrosoftOAuth2ClientManagerService,
+  ],
+  exports: [OAuth2ClientManagerService, MicrosoftOAuth2ClientManagerService],
 })
 export class OAuth2ClientManagerModule {}
diff --git a/packages/twenty-server/src/modules/connected-account/standard-objects/connected-account.workspace-entity.ts b/packages/twenty-server/src/modules/connected-account/standard-objects/connected-account.workspace-entity.ts
index cef7d476cf18..b1c0c97c1612 100644
--- a/packages/twenty-server/src/modules/connected-account/standard-objects/connected-account.workspace-entity.ts
+++ b/packages/twenty-server/src/modules/connected-account/standard-objects/connected-account.workspace-entity.ts
@@ -22,6 +22,7 @@ import { WorkspaceMemberWorkspaceEntity } from 'src/modules/workspace-member/sta
 
 export enum ConnectedAccountProvider {
   GOOGLE = 'google',
+  MICROSOFT = 'microsoft',
 }
 
 @WorkspaceEntity({
diff --git a/packages/twenty-server/src/modules/messaging/message-import-manager/services/messaging-get-message-list.service.ts b/packages/twenty-server/src/modules/messaging/message-import-manager/services/messaging-get-message-list.service.ts
index eca12dc5dbb0..c6bf2e68bf0a 100644
--- a/packages/twenty-server/src/modules/messaging/message-import-manager/services/messaging-get-message-list.service.ts
+++ b/packages/twenty-server/src/modules/messaging/message-import-manager/services/messaging-get-message-list.service.ts
@@ -35,6 +35,12 @@ export class MessagingGetMessageListService {
         return this.gmailGetMessageListService.getFullMessageList(
           connectedAccount,
         );
+      case 'microsoft':
+        // TODO: Placeholder
+        return {
+          messageExternalIds: [],
+          nextSyncCursor: '',
+        };
       default:
         throw new MessageImportException(
           `Provider ${connectedAccount.provider} is not supported`,
@@ -56,6 +62,12 @@ export class MessagingGetMessageListService {
           connectedAccount,
           syncCursor,
         );
+      case 'microsoft':
+        return {
+          messageExternalIds: [],
+          messageExternalIdsToDelete: [],
+          nextSyncCursor: '',
+        };
       default:
         throw new MessageImportException(
           `Provider ${connectedAccount.provider} is not supported`,
diff --git a/packages/twenty-website/src/content/developers/self-hosting/self-hosting-var.mdx b/packages/twenty-website/src/content/developers/self-hosting/self-hosting-var.mdx
index 9c5406625275..a4657acf598d 100644
--- a/packages/twenty-website/src/content/developers/self-hosting/self-hosting-var.mdx
+++ b/packages/twenty-website/src/content/developers/self-hosting/self-hosting-var.mdx
@@ -75,6 +75,7 @@ yarn command:prod cron:calendar:calendar-event-list-fetch
     ['AUTH_MICROSOFT_TENANT_ID', '', 'Microsoft tenant ID'],
     ['AUTH_MICROSOFT_CLIENT_SECRET', '', 'Microsoft client secret'],
     ['AUTH_MICROSOFT_CALLBACK_URL', 'http://[YourDomain]/auth/microsoft/redirect', 'Microsoft auth callback'],
+    ['AUTH_GOOGLE_APIS_CALLBACK_URL', 'http://[YourDomain]/auth/microsoft-apis/get-access-token', 'Microsoft APIs auth callback'],
     ['FRONT_AUTH_CALLBACK_URL', 'http://localhost:3001/verify ', 'Callback used for Login page'],
     ['IS_SIGN_UP_DISABLED', 'false', 'Disable sign-up'],
     ['PASSWORD_RESET_TOKEN_EXPIRES_IN', '5m', 'Password reset token expiration time'],
diff --git a/yarn.lock b/yarn.lock
index 8490802e9c90..289dd0c56623 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6682,6 +6682,32 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@microsoft/microsoft-graph-client@npm:^3.0.7":
+  version: 3.0.7
+  resolution: "@microsoft/microsoft-graph-client@npm:3.0.7"
+  dependencies:
+    "@babel/runtime": "npm:^7.12.5"
+    tslib: "npm:^2.2.0"
+  peerDependenciesMeta:
+    "@azure/identity":
+      optional: true
+    "@azure/msal-browser":
+      optional: true
+    buffer:
+      optional: true
+    stream-browserify:
+      optional: true
+  checksum: 10c0/0e5b3dd469be0606ba34a82464d18a8c919f396adf65756612e9ec0bb47c99c4c3eaf5d65eec953e2c6f5b79e48e003efe914adbfc8b741d098e8e8f7084ea8b
+  languageName: node
+  linkType: hard
+
+"@microsoft/microsoft-graph-types@npm:^2.40.0":
+  version: 2.40.0
+  resolution: "@microsoft/microsoft-graph-types@npm:2.40.0"
+  checksum: 10c0/c6f69a0fe136579d735efafc1375e4540e01d34ea488d987a9b651f7206c40c76991fff56df31e8b2593f16846bd748d0ffcf249d1f2629bb0298e6214fe2fdc
+  languageName: node
+  linkType: hard
+
 "@microsoft/tsdoc-config@npm:~0.16.1":
   version: 0.16.2
   resolution: "@microsoft/tsdoc-config@npm:0.16.2"
@@ -44331,6 +44357,8 @@ __metadata:
     "@linaria/core": "npm:^6.2.0"
     "@linaria/react": "npm:^6.2.1"
     "@mdx-js/react": "npm:^3.0.0"
+    "@microsoft/microsoft-graph-client": "npm:^3.0.7"
+    "@microsoft/microsoft-graph-types": "npm:^2.40.0"
     "@nestjs/apollo": "npm:^11.0.5"
     "@nestjs/axios": "npm:^3.0.1"
     "@nestjs/cli": "npm:^9.0.0"