Microsoft has released an update for Exchange Server 2003 that resolves problems found since the release of the...
Exchange 2003 Service Pack 1.
When attempting to move mailboxes across administrative groups, administrators have received an error message because the action was not permitted. The software company issued a fix for the problem that is available in the Microsoft Download Center.
The update can be installed on Windows Server 2000 and Windows Server 2003 with Exchange Service Pack 1 already installed.