Thank you so much for your kindly reply.
So sorry that we are not professional with Radius server. According to my research, the server must host a certificate from a Certificate Authority (CA) trusted by clients on the network. So as we also mentioned, the radius server needs the certificate.
Here we would like to share with you the below documents. Hope it could be some helpful to you.
Plan NPS as a RADIUS server
Network Policy Server Best Practices
Deploy Server Certificates for 802.1X Wired and Wireless Deployments
For any question, please feel free to contact us.
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