"Successful" Migration Batch Notification |
When I look at the details of the migration batch in EMS I see that the ValidationWarningCount is 1 and the ValidationWarnings show, "Error:The user already exists, but the migration batch that includes it couldn't be found. Before you try migrating the user within a batch again, please remove the existing user by running the Remove-MigrationUser cmdlet."
Migration Batch Validation Warnings |
Whoever wrote that error message deserves a raise. MUCH better than the "Error code 2" I'm used to getting.
A "MigrationUser" object is created for each user who is in the process of being migrated or the migration has not been completed, so it remains in a syncing state. I ran the Get-MigrationUser cmdlet which revealed that the mailbox was indeed "stuck" in a migration since 7/20/2013(!!) with no other issues.
This mailbox has been "migrating" for over two years! |
So, I removed the migration user using the Remove-MigrationUser cmdlet. I needed to use the -Force parameter since the move request no longer exists.
Remove-MigrationUser clears the way to re-run the migration |
This fixed the problem and I was able to move the mailbox and archive successfully. This condition would prevent a mailbox from moving to any other database or Office 365. It's strange that Exchange doesn't detect this when the batch request is created.
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