Symptoms
The remote session is blurry on screens with 4K and higher resolution and scaling of over 150%.
Cause
Below listed Group Policies are responsible.
Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Remote Session Environment:
RDP:
Set compression algorithm for RDP data
Optimize visual experience for Remote Desktop Server Sessions
RemoteFX:
Configure RemoteFX Adaptive Graphics
Configure compression for RemoteFX data
Configure image quality for RemoteFX Adaptive Graphics
Optimize visual experience when using RemoteFX
Resolution
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