I am running Exchange Server 2010(Version 14.1 - Build 218.15) on Windows Server 2008 R2. This is a all-in-one-server roles installation. Everything is working fine except forms-based authentication. When enabled I get HTTP Error 405.0 "Method not allowed". The page you are looking for cannot be displayed because an invalid method (HTTP verb) is being used.
Details are:
Module StaticFileModule
Notification ExecuteRequestHandler
Handler StaticFile
Error Code 0x80070001
Requested URL https://localhost:443/owa/auth/owaauth.dll
Physical Path C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\owa\auth\owaauth.dll
Logon Method Basic
Logon User administrator
When in EMC, Client Access, on OWA & ECP tabs I change authentication forms-based to standard with basic check box and restart IIS the Web Access works fine.
I have already tested solutions like recreating Virtual Directories, Allow .Net 2.0, etc. I have also checked all the modules and the associated mappings in IIS one by one for every VM. I believe this is an error in a .config file. If you have encountered
a situation like this please help.