"perisb" wrote : So your saying the enlistment of the JMS Session as an XA resource has nothing to do with JBM (or is completely orthogonal to it)? | Yes, the resource enlistment is done by the JCA adapter, not JBM. anonymous wrote : | Just curious: the connection factory name java:/JmsXA I'm using returns a JmsConnectionFactory. Snooping the source I noticed class JmsManagedConnectionFactory. What would be the purpose of this? That's a JCA resource adapter. The JCA spec will explain what all those things mean. The JCA adapter is not part of JBM, it's handled by the JCA team (which is part of the AS). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171509#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...