HTTP error 500 on auth.owa after Exchange rollup 3

After an upgrade to Exchange 2010 SP1, to add the update rollup 3 (v3), OWA stopped logging users in, instead just leaving them on a blank page (This was really a HTTP 500 error page for auth.owa).

Turns out that the “Microsoft Exchange Forms-Based Authentication service” was not restarted after the patching. Starting the service fixes this issue.


  • ibrahim commented on May 28, 2011

    Wow… i face the same problem, thx

  • Gregor commented on December 11, 2011

    Thanks, fixed the issue for me!

  • krishnam commented on February 9, 2012

    Thanks so much! i was encountering same issue!

  • Keith commented on April 10, 2012

    Thanks. That was such a simple fix and I wouldn’t have looked there for hours. ;)

  • Kristoffer commented on May 9, 2012

    I had the same problem with our Exchange 2010 SP1. I dident even know there were a problem untill a user told me, because I am not nonitoring the service.

    I monitor the website, but that show up as “working” because the site loads. It was only after they log’ed in the were problems

  • Brian commented on July 12, 2013

    Thanks – just moved from SBS2003 to SBS2011 – everything OK until I applied a service pack – same problem as reported here. Thanks for the advice Geoff – wouldn’t it be nice if after all this time MS had fixed it! :)

  • Richard commented on December 27, 2013

    Thanks a million for this!
    I have been struggling for days before hitting your site.
    Migrating SBS2011 to another hardware. One wonders why this service did not start..!

    Thanks once again!

  • Mike commented on May 15, 2014

    That was it! thanks

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