Switching SP2010 from Classic Mode to Claims Mode Authentication
SharePoint Server 2013 uses claims-based authentication as its default authentication model, and it is required to enable its advanced functionality. Using claims-based authentication has the following advantages over using Windows classic-mode authentication: External SharePoint apps support. App authentication and server-to-server authentication rely on claims-based authentication. With Windows classic-mode authentication you are unable to use external … Switching SP2010 from Classic Mode to Claims Mode Authentication