You could make the change on 1000's of machines in a few seconds be it group policy if they are member of AD.. Or simple push of reg edit from cmd line.. if you have account that has permissions on the machines…
Saying you have lots of machines so too much work to make a change on them seems odd...
https://blogs.technet.microsoft.com/heyscriptingguy/2012/03/17/edit-the-registry-on-multiple-remote-computers-with-powershell/