Windows 10 Screen Locked down policy

Hello everyone,
I want to set my windows 10 machines to locked  down the screen after 20 minutes via group policy.
I created a group policy with the following configuration:
Computer Configuration / Policies / System/ PowerManagement / Sleep Settings:
Specify the system sleep time out (plugged in) --> Enabled and 1200 seconds

I want my systems to lock screen after 20 minutes, is it the same as sleep time?
Thanks for help in advance.
Allan AAsked:
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DevAdminSystem Engineer | .NET Developer | Microsoft MVP | Technical SpeakerCommented:
Try look at the policy
Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Interactive logon: Machine inactivity limit

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Several ways to skin a fox.
You can deploy the classic screen saver policy as well and require the screen saver to lock the screen when it starts.
I hope you are aware of the differences of these methods?
Not only will both work, but they can be used for different scenarios: the first will apply to all users of a machine, the second will apply to specific users but on all machines - so probably you will prefer one over the other, but both would deserve an equal amount of points.
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Windows 10

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