One of my clients is running Exchange 2003 with SP2. When trying to access the OWA, they receive HTTP 404 – file not found. I have searched Google to find the solution, but can’t fix it. Following MS article Troubleshooting Outlook Web Access, I created a test Virtual Directory called OWA. It works and shows text only format (see below) like OMA if the Application Pool is DefaultAppPool.
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Saturday, March 24, 2007 11:54 PM <dir> Administrator
However, if I switch to the ExchangeApplicationPool, the test OWA will receive HTTP 404 too. Then I created a test pool call ExchApplPool and assign it to the OWA test, but that doesn’t fix the problem. The identity of ExchangeApplicationPool and ExchApplPool is Local System. Any suggestions?