Command
String
The name of the command to execute. In this instance, it's "LogOff".
Server
String
[Optional] Server name. Server can be specified by IP address or its local name. If this key is omitted, the user will be logged off from all sessions on all servers.
RequestPage
String
[Optional] The path to the current web portal page.
This is used in iOS, so that the iOS client can redirect the user back to the web portal page.