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Azhar Hussain

MS Exchange OWA Authorization failed


Published on February 05, 2012

Recently I encountered the issue with MS Exhange Outlook Web Access.
After login to OWA user recieved IIS Internal Server Error 500 page.

After analysis and researching the problem I found that there was a service for forms-based auth called "MSExchangeFBA" or "Microsoft Exchange Forms-Based Authentication service."

This service was not running and it was set to "Automatic (Delayed Start)" changing it to just "Automatic" allowed it to start properly.
Now that the service is running, it is fixed

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