Após Instalar o Exchange 2007 SP3 as Application Pools do IIS ficam Stopped (Event 2282, IIS-W3SVC-WP e Event 5002, WAS)

As Application Pools do IIS param após instalação do SP3 do Exchange 2007 no SBS 2008 e quando têm a True 32 bits enabled

Aparece os seguintes erro no Event Viewer:

Event 2282, IIS-W3SVC-WP
The Module DLL 'C:\Program Files\Microsoft\Exchange Server\ClientAccess\Owa\auth\exppw.dll' could not be loaded due to a configuration problem. The current configuration only supports loading images built for a x86 processor architecture. The data field contains the error number. To learn more about this issue, including how to troubleshooting this kind of processor architecture mismatch error, see http://go.microsoft.com/fwlink/?LinkId=29349.

Event 5002, WAS
Application pool 'Classic .NET AppPool' is being automatically disabled due to a series of failures in the process(es) serving that application pool.


Resolução:

1º) Ir a C:\Windows\system32\inetsrv\config e efetuar uma cópia do ficheiro applicationHost.config
2º) Editar o ficheiro applicationHost.config com o notepad
3º) No notepad procurar a palavra exppw e adicionar nos seguintes sitios o seguinte, preCondition="bitness64"
           
Nota: O ficheiro terá de ficar assim:
   <globalModules>
     <add name="exppw" image="C:\Program Files\Microsoft\Exchange Server\ClientAccess\Owa\auth\exppw.dll" preCondition="bitness64" />


<modules>
     <add name="exppw" preCondition="bitness64" />

4º) Grave o ficheiro e faça um IISRESET numa linha de comandos como Administrador.

Et voilá,

Espero que tenha corrido tudo bem.