pap@DSERVER ~ $  sudo systemctl restart xrdp.service
Failed to issue method call: Unit xrdp.service failed to load: No such file or directory. See system logs and 'systemctl status xrdp.service' for details.

 papl@DSERVER ~ $  systemctl status xrdp.service
Failed to issue method call: No such interface 'org.freedesktop.DBus.Properties' on object at path /org/freedesktop/systemd1/unit/xrdp_2eservice