I recently reconnected a number of mailboxes in Microsoft Exchange 2010 Service Pack 3 and following Active Directory replication I was unable to connect to those mailboxes either with the Exchange Management Shell or OWA with the following error messages:
Couldn't connect to the source mailbox Your account is disabled
In order to resolve this issue, I had to run the Clean-MailboxDatabase cmdlet agaisnt the mailbox databases to update the status of those mailboxes.
Get-MailboxDatabase | Clean-MailboxDatabase