We've recently migrated our WebSphere Process Server and WebSphere Business Monitor from V6.1 to Business Process Manager V8 and WebSphere MQ from 6.0 to 7.1. In WPS V6.1 we used Listener Ports as a message listener service and we could dynamically change its' maximum sessions count simply by changing the Maximum sessions and restarting the listener. Now each process with MDB uses Activation specification and we cant change its maximum sessions count without restarting the apptarget server. Even after restarting activ spec (online) by wsadmin script, the number of opened channel instances on WebSphere MQ doesn't change. Is there any way to dynamically change the Maximum server sessions parameter of the Activation specifications?