Baris Bey Merhaba tekrar,

Troubleshooting Outlook Web Access logon failures in Exchange 2000 and in Exchange 2003
http://support.microsoft.com/kb/327843

HTTP 401 or 404 error messages when you access OWA implicitly or explicitly
http://support.microsoft.com/kb/293386

Ozellikle 2. link sorunu cozecek gibi. İşlemlerden sonra durumu tekrar konusalim.

Gorusmek uzere,

Emre.