I am planning to purchase this HMD, but want to make sure Unreal supports this HMD.

It works, sorta - it’s quite close actually. I know of two options: The official MSFT Mixed Reality APIs seem to require UWP, but UE4 doesn’t currently support UWP, but there is a UWP branch of UE4 that apparently works. I haven’t tried this route. MSFT announced that they are adding some sort of …