In my lab I uninstalled Exchange 2010 and then installed Exchange 2013. The setup ran fine but after the setup the following errors were logged every second on my exchange server:
Navigate to C:\Windows\System32\inetsrv\config and open ApplicationHost.config file with notepad.
locate the following entry:
- <add name=”kerbauth” image=”C:\Program Files\Microsoft\Exchange Server\V14\Bin\kerbauth.dll” />
Change it from V14 to V15 and then reboot or do an IISRESET. After this all the errors should be gone.
The entry should read like this:
- <add name=”kerbauth” image=”C:\Program Files\Microsoft\Exchange Server\V15\Bin\kerbauth.dll” />
Hope it helps.