We have a SBS server running as a web server and exchange server. Outlook Web Access logs in the Administrator user, but no other users are able to log in - an internal server error occurs.
The other users have been assigned to all the same groups as the administrator within Active Directory. When we go to Server -> Protocols -> HTTP -> Exchange Virtual Server -> Properties, forms authentication is enabled with no compression. On the property pages of the childer, eg: Exchange, public; the authentication options are greyed-out.
We are using ssl.