I Have a windows 2003 SBS SP2 (exchange 2003).
Recently we noticed that users were unable to connect using mobile devices as domain.com/oma did not return a page. I have had this same problem occur with another client and performing steps outlined in this article http://support.microsoft.com/kb/883380
to reset exchange virtual directories had worked for me before, unfortunately in this instance i am now unable to access Outlook Web Access despite the virtual directories rebuilding exactly as they should. I have confirmed that ExchWeb has anonymous authentication enabled but i'm unsure whether it is worth while running through the rebuild process again or which direction i should go next. Any help getting Outlook Web Access working again would be greatly appreciated.