Hope someone can help. We are in the process of a 35,000 user migration to Exchange 2007. While testing Outlook anywhere we have found that the outlook 2007 client connects without issue. However, the Outlook 2003 and 2010 clients cannot connect. When we configure the outlook profiles in 2003 and 2010 I am not even able to do a successful "check name". However when the profile is created and I attempt to open Outlook it prompts for a username and password. Then says "you are not connected to the Exchange server" TMG boxes are in use here. I am confused why Outlook 2007 works fine and the other two clients dont.