Forcer le verrouillage de l'écran après un temps d'inactivité via GPO

[Clippy]

I run a network of computers et I would like enforce a GPO qui locks le screen après a predefined idle time. Je ne peux pas find this setting, I can seulement find a screen saver idle time setting, how can I get a log-out screen accomplished?

Thanks.

[Clippy]

Well, through Group Policy you can force to lock down a workstation via a password protected screensaver, mais pas to log it off. The GPO settings for locking down a workstation via screensaver can be found at:
Administrative templates\control panel\display\password protect le screen saver et screen saver timeout.