Nagios plugin to check active directory, checkdc.vbs is a script that performs the checks done by dcdiag.exe and parse its output to a nagios format. Right now its a limited script, no arguments and wont allow to select what to check. It basicly runs this command: dcdiag /test:services /test:replications /test:advertising /test:fsmocheck /test:ridmanager /test:machineaccount Check link for details.