3.3.5.3.1 Protocol Activation

The protocol is triggered when a user requests that the user's session be terminated, possibly by clicking a Sign-Out button. The WS resource MUST notify the resource IP/STS to issue a wsignout1.0 request. If the components are located on separate servers, this SHOULD be performed by sending a wsignout1.0 request message to the resource IP/STS using an HTTP 302 redirect.