You need to set a policy that prevents the device from shutting down while idling...

To prevent a ChromeOS device from shutting down while idling on the sign-in screen, you need to adjust the power management settings. This can be done through the following steps:

Go to the Google Admin console.

Navigate toDevice Management>Chrome Management>Device Settings.

Find thePower managementsection and locate the setting that controls idle behavior on the sign-in screen.

Adjust the setting to prevent shutdown during idle periods.

Option A is incorrect because idle settings primarily control screen dimming and sleep behavior.

Option B is incorrect because user experience settings generally focus on visual and interaction aspects, not power management.

Option C is incorrect because there isn't a specific "Allow shutdown" setting in ChromeOS device settings.