3.1.4.4 LsRequestSecurityTokenWithCookie
When the client is serving as a proxy for an STS in the Requestor STS role described in [MS-MWBF], the client SHOULD emit an LsRequestSecurityTokenWithCookie request message after it receives a session cookie from a web browser requestor requesting a security token using the protocol described in [MS-MWBF], given that no token has been posted in the wresult parameter described by [MS-MWBF].<4>