I have two User accounts that worked with the company as consultants last year. Their accounts were just for AD never had EMAIL setup. Their accounts were disabled and now have been re-enabled that they are back. I am trying to add mailboxes to their accounts. I went into Exchange and selected NEW MAILBOX > Existing User but it cannot find their names. I see them in AD. I can log into the domain as these users successfully but cannot have Exchange find their user accounts to create mailboxes. Any ideas?