How do I disable OWA for SSO?

To remove OWA from SSO follow these steps 

  1. Replace  C2WTShost.exe.config located here C:\Program Files\Windows Identity Foundation\v3.5\  with the original file.
  2. Replace the OWA web.config located here C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa\ with the original file.
  3. Replace the ECP web.config located here C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\ecp\Web.config with the original file.

Update Exchange

  1. Open the Exchange Management Console.
  2. Under Server Configuration -> Client Access, open the owa configuration under the “Outlook Web App” tab.
  3. In the Authentication tab and make sure “Use forms-based authentication” is  checked.
  4. Open up Internet Information Services (IIS) Manager.
  5. Expand the site where OWA is installed and click on the “owa” application.
  6. Double-click the Authentication icon and verify that Anonymous Authentication is set to Disabled.



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