We just set up a test server with Exchange 2007 and Windows Server 2008. We've added several users to Exchange, but when we try to log in using OWA, all we get is "The user name or password that you entered is invalid. Please try entering it again." Client access is setup to use forms, user name only, and we have tried like that and with standard authentication without any luck.I would like a good idea of what to look for and what to read up on to solve this issue. Thanks for your help!

i see that when you have more than 1 domain, what happens if you select UPN or domain\username or even turn forms off and use integrated auth?