Horizon Client (4.7): Forcing settings by GPO

Hello,

I'm trying to set some settings in the Horizon-Client by GPO, but for some unknown reasons, they are not enforced (but some are).

Elements not working:

In the GPO I've enabled the "H264 High Color Accuracy" and the "H264" option

As stated in the documentation, I see the entries under "HKLM\Software\Policies\VMware, Inc.\VMware Blast\config" on the Client, so the GPO itself is applied to the system.

But when I start the Horizon-Client and open the Blast settings, they are not active nor are they forced, so the normal user can change it.

So, do I misinterpret the GPO/Documentation, and these settings are not for the Horizon Client?

How can I enforce these settings on the Clients?

Thanks for your help!

Ben