We are late to the game and just now installing Exchange 2K10 SP1 onto our Exchange server (running all roles minus Edge Transport). After completeing the install and running through some tests all services seem to working without issue except for OWA (which was working prior to the update).
Currently when accessing OWA externally at http://mail.company.com we are receiving 403 – Forbidden: Access is denied. However if you enter https://mail.company.com the OWA sign in page comes up with out issue. I have followed the steps in this TechNet article with no success.
Any thoughts on how to resolve this are greatly welcomed.