OpenGL 4.4 support for vGPU in Windows Server 2016

Hello,

I just installed a Windows 10 Professional client in Hyper-V on a Windows Server 2016 host.

My graphics card is an NVIDIA Geforce GTX 1070 with the latest drivers installed.

I followed following instructions to enable OpenGL support:
http://social.technet.microsoft.com/wiki/contents/articles/31771.experience-guide-for-enabling-opengl-support-for-vgpu-in-server-2016.aspx

Unfortunately I only get OpenGL 1.1 instead of 4.4.

Is there anything else to set up in order to get OpenGL 4.4 running?

Thanks a lot for all your help!

Best regards,
Marco