New
#11
ok did u try set it up for the first time inside the domain itself or is the system outside the domain/network all the time. If so then there could be issues with it getting authenticated with the DC for some reason.
go to Control Panel
Click Mail
Delete all existing profiles(from previous testing)
Setup new profile and click properties.
Enter Username email address and everything else and let Outlook configure the whole thing? Does it get completed.
If not go to Manual setup and go and setup the server name and stuff. Go to the exchange over http setup and keep both the proxy and url as the server name itself..
for eg: exchsrv01.domainname.com then on ur DNS(External / ISP) setup exchsrv01.domainname.com to your external IP address.