Office 365 Mailbox Migration Status Stuck Syncing
We had a mailbox that wouldn’t complete migrating from a hybrid setup with on-premise Microsoft Exchange 2013 Server to Office 365. We’ve cancelled the migration several time and restarted it but it always got hung up at the end without completing, with status Syncing or InProgress… left it even for days and wouldn’t complete
We’ve found out that some corruption in the calendar ACLs that was causing the issue… Office 365 portal wouldn’t show any message about corruption or skipped items….
We connected to Office 365 through PowerShell and issued the following commands which would approved skipped items (that we never prompted to approve in the migration using the browser which was odd, then the 2nd command would complete it)
Set-MigrationBatch -Identity TypeNameOfTheBatchHere -ApproveSkippedItems
Complete-MigrationBatch -Identity TypeNameOfTheBatchHere