How to apply WMI namespace with a script ?

Hello,

I have to make some changes on WMI namespace rights using GPO.

I tried to follow this post to create a script that replicate the changes following this post: https://blogs.msdn.microsoft.com/spatdsg/2007/11/21/set-wmi-namespace-security-via-gpo-script/

I successfuly exported the security descriptor and when I run the script to push the changes nothing happen.

I'm using Windows 10 pro test VM.

Any ideas ?

Thanks