We had 1 Exchange 2007 Server that started having issues. We got a 2nd, configured it & moved all mailboxes & roles to it. We now want to down Server 1 & completely rebuild. As a test we shut off Server 1. Everything works fine except I have dozens of users who cannot work using the Outlook 2003 client. It is dead slow so much so that they think they are frozen. If they go to OWA the mail file is fine. I have deleted their profiles, same result. I have logged them in at a different pc same result. They are in different storage groups on new server so I am completely at a loss. Any ideas?