An IMS type feature server has been installed by another administrator team. They have also configured session manager to route all incoming calls for a user to be routed to the new feature server…

An IMS type feature server has been installed by another administrator team. They have also configured session manager to route all incoming calls for a user to be routed to the new feature server. It appears from running traces and capturing network traffic that Session does indeed route the User's incoming calls to the feature server, but that the feature server does not appear to take any action besides returning the request back to Session Manager. Which field may be incorrectly configured?