Couldn't switch the mailbox into Sync Source mode. This could be because of one of the following reasons: Another administrator ...

Exchange Server 2010

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.

Couldn't suspend the mailbox database copy because a backup is in progress. Please wait until the backup has completed, and ... Couldn't suspend the mailbox database copy because it is currently resynchronizing its log files with the source server. ... Couldn't switch the mailbox into Sync Destination mode. This could be because another administrator is currently moving the ... Couldn't switch the mailbox into Sync Source mode. This could be because of one of the following reasons: Another administrator ... Couldn't switch the mailbox into Sync Source mode. This could be because of one of the following reasons: Another administrator ... Couldn't update mailbox '{0}' because it is hosted on a legacy Exchange server. Update the mailbox from the server on which ... Couldn't update the primary SMTP address because this mailbox is configured to use an e-mail address policy. To disable the ... Country/region code Enter the numeric code for the country or region of this dial plan so that UM can dial domestic and international ... Country/region code Enter the numeric code for the country or region of this UM dial plan so that UM can dial domestic and ...