After decomissioning Exchange server you cannot run other applications on IIS, and application pools fail with the following message in the logfiles:
Het DLL-bestand C:\Program Files\Microsoft\Exchange Server\V14\Bin\kerbauth.dll van de module is niet geladen. Het gegevensveld bevat het foutnummer.
Resolution:
- Stop the IIS Service
 - Navigate to c:\windows\system32\intesrv\config and edit the file applicationhost.config
 - Remove the line outlined below
 - Restart the IIS Service
 
Locate, and delete the following line. After all 🙂 Exchange was uninstalled wasn’t it.
<add name="kerbauth" image="C:\Program Files\Microsoft\Exchange Server\V14\Bin\kerbau