Exchange 2010 – Error accessing mailbox that was re-connected

If you disable a user’s mailbox in Exchange 2010 it moves to the Disconnected Mailbox Container under Recipient Configuration in Exchange. Now when you re-connect the mailbox to the AD user and you try send an email to the account you get the following error: #554-5.2.1 mailbox disabled 554 5.2.1 Read more…