2.1 Transport
The GetFsTrustInformation request message (section 3.1.4.1.1.1), GetTrustedRealmUri request message (section 3.1.4.2.1.1), and GetClaims request message (section 3.1.4.3.1.1) MUST be transmitted using the HTTP POST method; they MUST NOT be transmitted using the GET method.
The client role and server role MUST use the HTTPS URL scheme to identify the server endpoints for processing GetFsTrustInformation request, GetTrustedRealmUri request, and GetClaims request messages.