Finding the Enabled Claims Authentication Type for a SharePoint Web Application
To find the enabled Claims authentication type in a SharePoint 2013/2010 Web Application
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Access SharePoint 2013/2010 Central Administration (Windows Start menu > All Programs > Microsoft SharePoint 2013/2010 Products).
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In SharePoint 2013/2010 Central Administration, under Application Management, select Manage web applications.
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Select the Web Application for which you want to find the Claims authentication type, and then click Authentication Providers.
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Click on the name of the Zone using Claims Based Authentication.
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Scroll down to the Claims Authentication Types section.