O Console do Exchange 2010 possui um ítem Disconnected Mailbox (Help Exchange)
Recipient Configuration > Disconnected Mailbox > Disconnected Mailbox
A disconnected mailbox is a mailbox that is not associated with an Active Directory directory service user account.
If you remove a mailbox by using either the Exchange Management Console or the Exchange Management Shell (specifically by using the Remove-Mailbox cmdlet without the Permanent or StoreMailboxIdentity parameters), you will remove the user object that is associated with the mailbox from Active Directory. By default, the disconnected Exchange mailbox object will remain in the Exchange database for 30 days before it is deleted.
E era isto…