Hi Bernd. In this case you need an endpoint in the client that allows the service to call back to it when the work is done (the service then becomes a client and the client then becomes a service). When the client does a send of the original work, I'd expect it to set the MessageID in the outgoing message. When the service sends back a response eventually, it sets the RelatesTo field in the response message and the client can use that to correlate the response with the original request. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200336#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...