I've connecting to the Exchange 5.5 using OWA. I get either one of the
following depend on the user.
OWA was unable to get to your inbox.
HTTP Error 401
401.1 Unauthorized: Logon Failed
This error indicates that the credentials passed to the server do not match
the credentials required to log on to the server.
Please contact the Web server's administrator to verify that you have
permission to access the requested resource.