I searched everywhere for a solution and no luck. Hopefully someone here can help. I have three Win 7 64 bit computers that are not able to connect to our Exchange server. It was working fine for a couple months, then all of a sudden, it stopped working on all three computers. I have tried everything (that i've read online). I turned off firewalls, virus scanners, reinstalled office 2007, disabled IPv6, Win 7 system restore, and no luck. I'm able to ping everything else but our Exchange server. Any help or ideas would be greatly appreciated.