Well, the problem is I'm getting | exception | javax.management.RuntimeMBeanException | org.jboss.mx.interceptor.ReflectedDispatcher.handleInvocationExceptions(ReflectedDispatcher.java:176) | org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:163) | org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) | org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) | org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) | org.jboss.mx.server.Invocation.invoke(Invocation.java:88) | org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:260) | org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) | org.jboss.jmx.adaptor.control.Server.invokeOpByName(Server.java:258) | org.jboss.jmx.adaptor.control.Server.invokeOp(Server.java:223) | org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOp(HtmlAdaptorServlet.java:262) | org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:100) | org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doPost(HtmlAdaptorServlet.java:82) | javax.servlet.http.HttpServlet.service(HttpServlet.java:717) | javax.servlet.http.HttpServlet.service(HttpServlet.java:810) | org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | when I'm trying to execute createMailbox. The only useful thing I've found in server logs is | caused by: java.lang.nullPointerException | at org.jboss.mail.mailbox.MailboxServiceImpl.org$jboss$mail$mailbox$MailboxServiceImpl$GetMailboxByAlias$aop(MailboxServiceImpl.java:108) | And I really have no ideas what does it mean. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3991212#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...