I spent the weekend fixing some major IIS issues and Exhange OWA issues for a client. They had removed IIS compeltely from the server, and I re set it up and made sure OWA was working for all users. EMC and EMS at one point wouldn't connect to the (local) SBS server. All that has been resolved. OWA is working 100%.
What the issue is right now, is none of the outlook clients are working. Setting them up resolves the local server instantly, but when they try to load I get prompted for the local account credentials. Tried running different profiles, different users, etc. Tried resetting permissions and passwords. I get "Cannot start Microsoft....You do not have permission to log on".
Let me know if you need more details!