We are migrating mailbox from one database to another in Exchange 2010 but is stuck & getting below error.
11/30/2013 9:21:18 PM [MS06] The job encountered too many transient failures (60) and is quitting.
11/30/2013 9:21:18 PM [MS06] Fatal error SourceMailboxAlreadyBeingMovedTransientException has occurred.
Error details: Couldn't switch the mailbox into Sync Source mode.
This could be because of one of the following reasons:
Another administrator is currently moving the mailbox.
The mailbox is locked.
The Microsoft Exchange Mailbox Replication service (MRS) doesn't have the correct permissions.
Network errors are preventing MRS from cleanly closing its session with the Mailbox server. If this is the case, MRS may continue to encounter this error for up to 2 hours - this duration is controlled by the TCP KeepAlive settings on the Mailbox server.
Wait for the mailbox to be released before attempting to move this mailbox again. --> MapiExceptionMailboxInTransit: Unable to open message store. (hr=0x80004005, ec=1292)