Microsoft has apparently discontinued support of RemoteFX in Remote Desktop Services starting with Windows Server 2019, Build 1803 and later. Here’s the article:
That would be fine if there were an acceptable alternative available. The problem is that there isn’t. What Microsoft is calling an alternative: Discrete Device Assignment, has serious, show-stopper limitations that remove all high-availability features, live migrate, etc: https://docs.microsoft.com/en-us/windows-server/virtualization/hyper-v/plan/plan-for-deploying-devices-using-discrete-device-assignment
From that article:
Virtual Machine Limitations
Due to the nature of how Discrete Device Assignment is implemented, some features of a virtual machine are restricted while a device is attached. The following features are not available:
- VM Save/Restore
- Live migration of a VM
- The use of dynamic memory
- Adding the VM to a high availability (HA) cluster
PowerShell commands also depreciated
Further to this, starting with Build 1809 Microsoft also appears to have closed the back-door work around of using PowerShell commands to install the RemoteFX drivers. Commands such as “Get-VMRemoteFXPhysicalVideoAdapter” no longer return any data.
This NVidia article confirms (via a Footnote) that RemoteFX vGPU has been deprecated by Microsoft since Windows Server, version 1803.
Bottom Line: RemoteFX is Gone, There is no Replacement for High-Availability RDP VMs
For my company, this means that GPUs such as the NVidia Tesla T4 GPUs will no longer accelerate VMs placed in Microsoft Hyper-V HA Clusters.