Thursday, June 3, 2010

Exchange 2007 Rollup Causes “Outlook Web Access was unable to initialize” errors

By:Rik Hoffelder
If you’re reading this chances are you have applied a rollup to Exchange 2007. In my case it was Rollup 4 for Exchange 2007 SP2. After applying the update OWA users began experiencing errors accessing the login page stating “Outlook Web Access was unable to initialize. Contact your administrator.”

When this occurred MSExchangeOWA wrote a FormsRegistry error with Event ID 4 into that application log. Specifically it stated the “More than one forms registry is named Premium” as shown below.



After researching the problem on the web and finding nothing I did a little investigating and found the problem to be a simple case of an installer not cleaning up after itself. In this case a directory named Copy of premium existed in the same sub-directory as the premium directory. This is typically located under C:\Program Files\Microsoft\Exchange Server\ClientAccess\Owa\forms.



To resolve the problem I simply deleted the Copy of premium directory then ran IISRESET /NOFORCE. This resolved the issue in my case. I can’t say it will work for everyone, but since there is very little information about this error anywhere, I thought I would share at least one solution.





More information on Exchange



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