For RC 9 it can be declared in "jboss.xml" in the ejb project: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS 4.0//EN" "http://www.jboss.org/j2ee/dtd/jboss_4_0.dtd"> <security-domain>MySecurityDomain</security-domain> Important is that the security domain name must not be prefixed with "java:/jaas/". View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3977689#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...