You can provide your own JAXBContextFactory, take a look at org.jboss.ws.core.jaxws.CustomizableJAXBContextFactory for instance. This way you can setup the property you need in the context at creation. Then make sure your context factory is loaded by the JBossWS ServiceLoader (basically you might want to either set your factory through a System property or add a org.jboss.ws.core.jaxws.JAXBContextFactory file in META-INF/services somewhere in the classpath). View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4257711#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...