diff --git a/src/modules/ox/domain/ox-event-handler.spec.ts b/src/modules/ox/domain/ox-event-handler.spec.ts
index 0513f6411..58cdd885e 100644
--- a/src/modules/ox/domain/ox-event-handler.spec.ts
+++ b/src/modules/ox/domain/ox-event-handler.spec.ts
@@ -546,7 +546,7 @@ describe('OxEventHandler', () => {
 
             expect(oxServiceMock.send).toHaveBeenCalledTimes(0);
             expect(loggerMock.error).toHaveBeenLastCalledWith(
-                `No requested email-address found for personId:${personId}`,
+                `No REQUESTED email-address found for personId:${personId}`,
             );
         });
 
@@ -828,7 +828,7 @@ describe('OxEventHandler', () => {
 
             expect(oxServiceMock.send).toHaveBeenCalledTimes(0);
             expect(loggerMock.error).toHaveBeenLastCalledWith(
-                `No requested email-address found for personId:${personId}`,
+                `No REQUESTED email-address found for personId:${personId}`,
             );
         });
 
@@ -878,12 +878,12 @@ describe('OxEventHandler', () => {
         it('should publish OxUserChangedEvent on success', async () => {
             personRepositoryMock.findById.mockResolvedValueOnce(person);
             emailRepoMock.findByPersonSortedByUpdatedAtDesc.mockResolvedValueOnce(getRequestedEmailAddresses(email));
-
+            const currentAliases: string[] = [faker.internet.email()];
             //mock getData
             oxServiceMock.send.mockResolvedValueOnce({
                 ok: true,
                 value: createMock<GetDataForUserResponse>({
-                    aliases: [faker.internet.email()],
+                    aliases: currentAliases,
                     username: oxUserName,
                     id: oxUserId,
                     primaryEmail: email,
@@ -900,6 +900,14 @@ describe('OxEventHandler', () => {
 
             expect(oxServiceMock.send).toHaveBeenCalledTimes(2);
             expect(loggerMock.error).toHaveBeenCalledTimes(0);
+            expect(loggerMock.info).toHaveBeenCalledWith(
+                `Found mostRecentRequested Email-Address:${JSON.stringify(email)} For personId:${personId}`,
+            );
+            //use regex, because strict comparison fails, local test-var currentAliases has changed by the implemented function when expect is checked here
+            expect(loggerMock.info).toHaveBeenCalledWith(
+                expect.stringMatching(/Found Current aliases:.* For personId:/),
+            );
+            expect(loggerMock.info).toHaveBeenCalledWith(`Added New alias:${email} For personId:${personId}`);
             expect(loggerMock.info).toHaveBeenLastCalledWith(
                 `Changed primary email-address in OX for user, username:${person.referrer}, new email-address:${email}`,
             );
@@ -908,7 +916,7 @@ describe('OxEventHandler', () => {
                     personId: personId,
                     keycloakUsername: referrer,
                     oxUserId: oxUserId,
-                    oxUserName: oxUserName,
+                    oxUserName: referrer, //this is the new OxUserName, it's changed on renaming in SPSH
                     oxContextId: contextId,
                     oxContextName: contextName,
                     primaryEmail: email,
diff --git a/src/modules/ox/domain/ox-event-handler.ts b/src/modules/ox/domain/ox-event-handler.ts
index 5accc0054..0dd0982f2 100644
--- a/src/modules/ox/domain/ox-event-handler.ts
+++ b/src/modules/ox/domain/ox-event-handler.ts
@@ -303,9 +303,13 @@ export class OxEventHandler {
         const requestedEmailAddresses: Option<EmailAddress<true>[]> =
             await this.emailRepo.findByPersonSortedByUpdatedAtDesc(personId, EmailAddressStatus.REQUESTED);
         if (!requestedEmailAddresses || !requestedEmailAddresses[0]) {
-            this.logger.error(`No requested email-address found for personId:${personId}`);
+            this.logger.error(`No REQUESTED email-address found for personId:${personId}`);
             return undefined;
         }
+        this.logger.info(
+            `Found mostRecentRequested Email-Address:${JSON.stringify(requestedEmailAddresses[0].address)} For personId:${personId}`,
+        );
+
         return requestedEmailAddresses[0];
     }
 
@@ -615,15 +619,18 @@ export class OxEventHandler {
             );
         }
         const newAliasesArray: string[] = getDataResult.value.aliases;
+        this.logger.info(`Found Current aliases:${JSON.stringify(newAliasesArray)} For personId:${personId}`);
+
         newAliasesArray.push(requestedEmailAddressString);
+        this.logger.info(`Added New alias:${requestedEmailAddressString} For personId:${personId}`);
 
         const params: ChangeUserParams = {
             contextId: this.contextID,
-            userId: getDataResult.value.id,
-            username: getDataResult.value.username,
+            userId: person.oxUserId,
+            username: person.referrer,
             givenname: person.vorname,
             surname: person.familienname,
-            displayname: person.referrer,
+            displayname: person.referrer, //IS EXPLICITLY NOT SET to vorname+familienname
             defaultSenderAddress: requestedEmailAddressString,
             email1: requestedEmailAddressString,
             aliases: newAliasesArray,
@@ -653,8 +660,8 @@ export class OxEventHandler {
             new OxUserChangedEvent(
                 personId,
                 person.referrer,
-                getDataResult.value.id,
-                getDataResult.value.username,
+                person.oxUserId,
+                person.referrer, //strictEquals the new OxUsername
                 this.contextID,
                 this.contextName,
                 requestedEmailAddressString,