Can't turn off domain controller
(Nightly from 8/15/2014)
Once you start domain controller you can't stop it. Turning the slider off stops then restarts the service, and puts a "service could not be stopped" message in the GUI. CIFS can't be stopped at all, it doesn't even try. (I think that is intentional)
The only way I can stop the service is modify the database and then reboot.