KB ID 0001581
I was doing a migration from Exchange 2007 (on prem) to Exchange 2013 (on prem), this week. I had a number of mailboxes that were ‘StalledDueToMailboxLock‘.
Nice easy fix, on the Source and Destination Exchange severs, restart the ‘Microsoft Exchange Mailbox Replication Service‘.
Wont this break my Mailboxes! No, it will interrupt the migration process, (which is already stalled). But the actual ‘Live‘ mailbox, remains on the ‘Source Server‘, until the process is successfully completed anyway.
It can take a few minutes, (time for a coffee) but check and the process should now have resumed ‘CopyingMessages‘.
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