I create new test box and meet owa issue. I access default web by https:\\localhost\owa. The service is unavailable error 503 Log Name: System
Source: Microsoft-Windows-WAS
Date: 9/14/2012 8:43:00 AM
Event ID: 5139
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Description:
A listener channel for protocol 'http' in worker process '4996' serving application pool 'DefaultAppPool' reported a listener channel failure. The data field contains the error number.
A:
Maybe C:\Program Files\Microsoft\Exchange Server\V14\Bin\kerbauth.dll failed to load.
please copy it from other server and check applicationhost module path.
edited applicationHost.config file and change it to point to C: drive instead of E: for kerbauth