There are cases when you need to reset the default virtual directories that are required to provide Outlook Web Access, Exchange ActiveSync, and Outlook Mobile Access services in Exchange Server 2003. If you have messed up some of the virtual directories or OWA is hanging (working sporadically), resetting the directories the way it is demonstrated in the following video tutorial could resolve your problem.
I just finished the "Upgrade from Exchange 2007 to 2013" Part I screencast and must tell you that it is extremely well done! I found no variances between the video/script and what I experienced. At the end of Part 1 ...
Bob Duffett, Priority Software Inc. ...more...