he Module DLL C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa\auth\exppw.dll failed to load

I have the same problem like in this topic:

http://social.technet.microsoft.com/Forums/da-DK/exchangesvrtransport/thread/686d1a90-a016-4a4c-ae2e-6725914a5d5a?prof=required

The latest Windows/Exchange 2010 Updates are installed.

The solution from fiona didn´t help:

"I would suggest you perform the following steps to troubleshoot this issue:

• Remove the exppw.dll entry from applicationhost.cofig (c:\windows\system32\inetsrv\config)Note: Remember take a backup before you remove the line.
• Then registered the exppw.dll by following the below steps:

1. IIS Manager -> Select the Server Name in the left Pane -> Open Modules in the middle pane.
2. Click on ‘Configure Native Modules’ in the right pane -> Click the button ‘Register’ -> Type the name as ‘exppw’
3. Browse and select the path of above file as: c:\Programme Files\Microsoft\Exchange Server\V14\Client Access\OWA\Auth\exppw.dll.
4. Made sure that the 'exppw.dll' is only present at OWA level and not at any of the top heirarchy.
5. Then ensured for this module in OWA (VDir), ‘Module Type’ is set to ‘Native’ and ‘Entry Type’ is ‘Local’
6. Run IISreset /noforce

Let me know if this works. Thanks. "