diff --git a/src/cdk/v2/destinations/intercom/config.js b/src/cdk/v2/destinations/intercom/config.js
index 96b7abd280..164e7d593d 100644
--- a/src/cdk/v2/destinations/intercom/config.js
+++ b/src/cdk/v2/destinations/intercom/config.js
@@ -20,6 +20,7 @@ const ReservedUserAttributes = [
   'firstname',
   'createdAt',
   'timestamp',
+  'lastSeenAt',
   'originalTimestamp',
   'unsubscribedFromEmails',
 ];
diff --git a/src/cdk/v2/destinations/intercom/procWorkflow.yaml b/src/cdk/v2/destinations/intercom/procWorkflow.yaml
index 0452faf431..c74d2f71ff 100644
--- a/src/cdk/v2/destinations/intercom/procWorkflow.yaml
+++ b/src/cdk/v2/destinations/intercom/procWorkflow.yaml
@@ -55,7 +55,7 @@ steps:
         email: {{{{$.getGenericPaths("email")}}}},
         phone: {{{{$.getGenericPaths("phone")}}}},
         avatar: {{{{$.getGenericPaths("avatar")}}}},
-        last_seen_at: $.toSeconds({{{{$.getGenericPaths("timestamp")}}}}),
+        last_seen_at: $.toSeconds(.context.traits.lastSeenAt),
         role: .traits.role || .context.traits.role,
         signed_up_at: $.toSeconds(.traits.createdAt || .context.traits.createdAt),
         owner_id: .traits.ownerId || .context.traits.ownerId ? Number(.traits.ownerId || .context.traits.ownerId) : undefined,
diff --git a/test/integrations/destinations/intercom/processor/data.ts b/test/integrations/destinations/intercom/processor/data.ts
index e8dedcf6ec..490d6bcbf6 100644
--- a/test/integrations/destinations/intercom/processor/data.ts
+++ b/test/integrations/destinations/intercom/processor/data.ts
@@ -231,6 +231,7 @@ export const data = [
                   lastName: 'Rudderlabs',
                   address: 'california usa',
                   ownerId: '13',
+                  lastSeenAt: '2023-11-10T14:42:44.724Z',
                 },
               },
               type: 'identify',
@@ -267,7 +268,7 @@ export const data = [
                 JSON: {
                   email: 'test@rudderlabs.com',
                   external_id: 'user@1',
-                  last_seen_at: 1700628164,
+                  last_seen_at: 1699627364,
                   name: 'Test Rudderlabs',
                   owner_id: 13,
                   phone: '+91 9999999999',
@@ -358,7 +359,6 @@ export const data = [
                 JSON: {
                   email: 'test+2@rudderlabs.com',
                   external_id: 'user@2',
-                  last_seen_at: 1700628164,
                   name: 'Test RudderStack',
                   owner_id: 14,
                   phone: '+91 9299999999',
diff --git a/test/integrations/destinations/intercom/router/data.ts b/test/integrations/destinations/intercom/router/data.ts
index f7c5942703..2fc9f34d70 100644
--- a/test/integrations/destinations/intercom/router/data.ts
+++ b/test/integrations/destinations/intercom/router/data.ts
@@ -22,6 +22,7 @@ export const data = [
                     lastName: 'Rudderlabs',
                     address: 'california usa',
                     ownerId: '13',
+                    lastSeenAt: '2023-11-10T14:42:44.724Z',
                   },
                 },
                 type: 'identify',
@@ -191,7 +192,7 @@ export const data = [
                   JSON: {
                     email: 'test@rudderlabs.com',
                     external_id: 'user@1',
-                    last_seen_at: 1700628164,
+                    last_seen_at: 1699627364,
                     name: 'Test Rudderlabs',
                     owner_id: 13,
                     phone: '+91 9999999999',