The https://docs.jboss.org/author/display/AS71/EJB+invocations+from+a+remote+server+instance article has been updated with the relevant security configuration details. Sorry about the delay. If you still run into issues related to this, feel free to either create a new thread or post here (if it's relevant to this thread).
Is there a way to specify the user and password in code rather than in the standalone.xml for EJB invocations from a remote server instance?
Problem solved with new documentation, https://docs.jboss.org/author/display/AS71/EJB+invocations+from+a+remote+server+instance , but the file is "application-users.properties" with users and passwords must be the "Hots Control" and not "Domain Control".