Inquiridor,
Esse processo é simples, de sugiro a fazer em um ambiente de homologação.
Veja o o material a seguir:
https://blogs.technet.microsoft.com/networking/2012/05/30/creating-a-secure-802-1x-wireless-infrastructure-using-microsoft-windows/
https://www.youtube.com/watch?v=wliUq5KxOHA
https://www.youtube.com/watch?v=qeTMlFLZlLM
http://techbast.com/2015/05/setting-up-radius-server-wireless-authentication-in-windows-server-2012-r2.html
Marcos Henrique