[Today's post comes to us courtesy of Justin Crosby, David Santamaria, and Damian Leibaschoff]
Users may receive the following error when access /EXCHANGE or /PUBLIC on an SBS 2008 server. Users can still access OWA using the /OWA path.
SBS 2008 users should always use /OWA or RWW to access OWA. This issue is a very rare issue, but if encountered can take a very long time to troubleshoot.
HTTP Error 500.0 - Internal Server Error
The page cannot be displayed because an internal server error has occurred.