If you make any configuration changes for SIP or XMPP federation configuration, you must restart the Cisco XCP Router on IM and Presence. If you restart the Cisco XCP Router, IM and Presence automatically restarts all active XCP services.
Note that you must restart the Cisco XCP Router, not turn off and turn on the Cisco XCP Router. If you turn off the Cisco XCP Router, rather than restart this service, IM and Presence stops all other XCP services. Subsequently when you then turn on the XCP router, IM and Presence will not automatically turn on the other XCP services; you need to manually turn on the other XCP services.