To list missing modules, you need to use the nlserver monitor -missing command. Another useful command is nlserver monitor. It lists the monitoring XML file (obtained in the Adobe Campaign client or via the monitor.jsp web page).
nlserver monitor -missing 11:00:39 > Application server for Adobe Campaign Version 6.1.1 (build 8510) from 30/12/2013 inMail@test mta@test wfserver@test