to get 4K resoltution with Edge on Windows, you need to activate VBS (Virtualization-based Security) and Secure Boot. In that config, DRM keys are stored in a trusted application in secure world, and Edge from normal world ask the TA to decrypt the stream.
Server side Netflix has nothing to do, just send out the encrypted stream if asked by a client.
Server side Netflix has nothing to do, just send out the encrypted stream if asked by a client.