GP to auto logg off servers

A few weeks ago I posted about a group policy to log off people from servers after some time of inactivity.  The answer that I accepted seemed bang on, but was not.  That answer involved using the settings under RDS in GP to auto log off users after some amount of inactivity.  Those GPs did not apply and I think it's because those GPs are specifically for sessions managed by RDS servers, and that's not what I have here.

I manage about 200 servers across four domains.  All of the admins have this nasty habit of logging into servers and staying logged in by simply disconnecting the RDP session.  So, my WSUS updates get all snafued because of that.

I need a GP that will log them off after some amount of inactivity and the one above just doesn't do that.  Here's the other thread...

https://www.experts-exchange.com/questions/28956031/Group-Policy-to-log-users-off-of-server-after-specified-period-of-time.html

Can I get some help on making this happen?

Thanks

Cliff