The GEANT Campus Best Practice (CBP) activity has created a very valuable configuration instruction document "Using Windows NPS as RADIUS in eduroam" which was available from the now defunct CBP website.
UK operator Jisc also has a video playlist on YouTube that steps you through various sections of the NPS configuration: https://www.youtube.com/playlist?list=PLbKeiLya4JyA_6A10XKhnCzEY4eyApG4M
This section begs for community input.
A guide made by the Oxford Centre of Islamic Studies is here: https://support.eduroam.uk/files/PacketFence%20eduroam.pdf.