I recently had a interesting issue where I was seeing the 1121 error below in the Application log on one of my Exchange 2013 servers every minute.
Log Name: Application
Source: MSExchange Mailbox Replication
Date: 14/01/2015 2:23:34 p.m.
Event ID: 1121
Task Category: Request
Level: Error
Keywords: Classic
User: N/A
Computer: ex1.contoso.com
Description:
The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error.
Request GUID: '60b5375b-0f27-4561-a0f2-af428dd3c501'
Database GUID: '43ce3977-2c7f-4c6a-937b-b94966c81122'
Error: An Active Directory Constraint Violation error occurred on dc1.contoso.com. Additional information: The name reference is invalid.
This may be caused by replication latency between Active Directory domain controllers.
Active directory response: 000020B5: AtrErr: DSID-03152CB1, #1:
0: 000020B5: DSID-03152CB1, problem 1005 (CONSTRAINT_ATT_TYPE), data 0, Att 9fc1287c (msExchMailboxMoveSourceMDBLink)
--> A value in the request is invalid..
The reference to “msExchMailboxMoveSourceMDBLink” was the only indication the error related to a mailbox move request. Frustratingly, no requests showed up from running Get-MoveRequest.
After some ineffective troubleshooting I eventually found the solution from Exchange MVP Jeff Guillet. The error message he shows in his article is different to mine, but the fix is the same.
I had to run the following command:
Remove-MoveRequest -MoveRequestQueue '43ce3977-2c7f-4c6a-937b-b94966c81122' -MailboxGuid '60b5375b-0f27-4561-a0f2-af428dd3c501'
I still don’t know the cause of the problem, but I have a suspicion it followed a reverse mailbox move from Exchange 2013 (CU6) to Exchange 2007 (SP3 RU13).
Hopefully this helps if you ever come across the same issue.
Good to know we have just migrating from the same 07 and 13 platforms 🙂
They for the heads up. Anyway to clear all of them without specifying the GUID? I have thousands of these. I am going through them 1 by 1, but it is a process.
Thanks for this. Had the same problem in my domain after a Ex 2003 & 2007 migration to EX 2013. The above command fixed the constant stream of errors on the Ex 2013 server.
Same Event 1121 but different Error:
The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error.
Request GUID: ‘e75ce1d7-bfec-4c91-975f-d358ec7aebd5’
Database GUID: ‘8440d4ca-f820-42fd-a09b-44e629998f12’
Error: Database ‘bef5f416-314a-4cf7-9f07-deab1d9ee62f’ doesn’t exist..
Using the Remove-MoveRequest -MoveRequestQueue -MailboxGuid worked for me