Ok, great to hear it works, Regarding the signalling of the PI vs the token, the way you 'solved' it now does not make any difference. What is common is to have e.g. an id of the task/state/token in the external system and use that id to explicitly signal that task/state/token. That Id should be send to the external service and when that returns it should send that id again, kind of like a callback parameter. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4245049#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...