Friday, April 12, 2013

SharePoint2013 Provider hosted app with ACS trust unable to talk back to SharePoint with Error: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. Certificate error

Scenario: When your provider hosed apps remote app web\webapplication is trying to talk back to SharePoint you may receive an Error: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. Certificate error.

Resolution: Although you may get this error for several reasons with SharePoint, one that worked for me within the context of the apps is: Open the website in the browser and Install the certificate to the local machines trusted root authority, by clicking on the "Lock" icon in the browsers address bar.

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