I have a new Exchange 2007 server and I connected with no issues from 3 client computers. 1 was my Mac and Entourage 2008, 1 was a Windows XP running Outlook 2007, and 1 was VMWare in my Mac Windows Vista/Outlook 2007. Now I have a two new computers, XP Pro/Outlook 2007 and a Windows Vista/Outlook 2007 and neither can connect to the Exchange 2007 server. I have looked through this thread dealing with Exchange 2003 http://forums.microsoft.com/technet/showpost.aspx?postid=1557066&siteid=17&sb=0&d=1&at=7&ft=11&tf=0&pageid=0 but it was of no help. Does anyone have any suggestions?The vista computer fills in username/mail server automatically, but I get "The action cannot be completed. The connection to the Microsoft Exchange Server is unavailable. Your network adapter does not have a default gateway."On the XP computer it doesn't fill out anything automatically and I can manually configure the account and then login with FQD/user and password. But I don't want to have to login everytime. I would like to user Kerberos Auth.Thanks-Troy

So I found this in my event viewer:"Windows cannot bind to $DOMAINNAMEdomain {Invalid Credentials} Group Policy processing aborted." Looks like I am not getting credentials from dc?

If anyone else is interested, I found that for the XP computer, the user had mapped a network drive from another Domain and saved those credentials. Those were being passed to the Exchange server. Running "control keymgr.dll" showed saved credentials. I removed the other domain information and restarted and everything worked. I am still struggling with the Vista machine and Outlook 2007 still coming up with "Unable to connect to Exchange Server" So anyone with insight would be greatly appreciated.-Troy