Windows 2012: how to make power button work in every cases?

Windows 2012: how to make power button work in every cases?



I need some Windows 2012 servers to be shutdown properly with the power

button.

If nobody is logged, the power button correctly shuts down the server

If somebody is logged without a blocking program, it's okay too

But:

if a session is locked, the power button does nothing

if somebody is logged with a blocking program, the button does nothing too

With previous Windows versions I was used to configure the power button

behaviour with the GUI and modify a registry key

(HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system\shutdownwithoutlogon)

but this seems not any more relevant.

Does anyone knows the "offical" way, or a trick ?