The JBoss Messaging service configuration is spread among several configuration files. Depending on the functionality provided by the services it configures, the configuration data is distributed between <JBOSS_HOME>/server/<configuration>/deploy/messaging-service.xml, remoting-service.xml, connection-factories-service.xml, destinations-service.xml and xxx-persistence-service.xml (where xxx is the name of your database). The default will be hsqldb-persistence-service.xml for the hsqldb database.