There may be some confusion, looking at all the public documentation for SharePoint, in regard to exactly what is and isn’t supported in terms of SAML tokens. This article https://technet.microsoft.com/en-us/library/cc262350(v=office.16).aspx#plansaml states the following: SAML token-based authentication SAML token-based authentication in SharePoint Server 2016 uses the SAML 1.1 protocol and the WS-Federation Passive Requestor Profile (WS-F PRP).