Federated Authentication allows users to access the application or web sites by authenticating them against a certain set of rules, known as claims. The authentication ticket or the token is used to validate the user across multiple application, web sites, or IT systems.
Claim-based authentication is a method to acquire the user identity related information on both on-premises and cloud-based products. A single token is created based on the predefined claims to identify the users trying to access the applications or web site. After the identification of the user is complete, a security token service is used to identify the type of user.
Active Roles supports federated authentication with Security Assertion Markup Language (SAML), through which you can sign in to an application once using the single sign-on option and you are authenticated to access websites.
For more information, see Appendix E: Enabling Federated Authentication
NOTE: While switching between the STS providers, restart IIS and clear the browser cache.