I had some major issues with permissions and such, I fixed them by folowwing this:
that fixed the issue,
OWA works EVERYWHERE
however all of my clients who are on the internet can not connect via outlook, they will get the password prompt, but then it just says tyring to connect...
i tried making an entirely new profile on a new computer, on the internet, when i click "check name" i would get the login / pass prompt, and that would tell me if put in the wrong password or not, however after this it just freezes then comes back and says it can not connect to the out look server.
If i make a new account on a machine, local to the exchange server, it works fine.
before this everything was fine and working great, nothing has changed on the router or Firewall, port 443 is forwarded to the exchange server (as i said OWA works fine)
my issues is most defiently related to RPC/HTTP ON THE SERVER SIDE