We are migrating from NT4 with Exchange 5.5 to Windows Server 2003 and Exchange 2003. So far almost all the mailboxes are moved to the new server. We are still using OWA on the 5.5 server. Everyone who was moved can still use OWA. The mailboxes that have not yet been moved can also access OWA. However, when we create NEW USERS on the 2003 server and create a mailbox for them they cannot access OWA 5.5. From within the network, I can use the new servername/exchange and login just fine with that user. Since all users have not been moved yet what must be done to allow the new users to login to OWA 5.5. I have ADC setup and the connection agreements work fine. I also added the new domain's domain users group to be able to "log on locally" to the 5.5 server. All email still goes through the old server (incoming mail) and get properly sent to the new users mailbox on the new server. We just can't use OWA 5.5.