I'm attempting to migrate from Exchange 2003 to Exchange 2010. I have the client access, hub, mailbox roles all setup on one new box. I've moved a test user to the new box and am attempting to connect via Outlook. I've made sure that all the services are running, the stores are mounted, DNS is correct, etc, but I can't connect. I get an error message saying "Cannot open your default e-mail folders. The attempt to log on to Microsoft Exchange has failed." If I uncheck encypt data in the account setup in Mail settings I then get "cannot open your default email folders the information store cannot be opened". Any ideas? This is driving me crazy as everything looks correct and I'm set to go live in a few days.