This article assumes you have a working Microsoft Server Network Policy Server configuration already functional.
See here for NPS configuration: How to configure 802.1x based Netlogin with Radius on EXOS
- Configure NAC as an authorized RADIUS client
- Go into NAC Manager --> Tools --> management and configuration --> Advanced configuration --> AAA configurations and configure the type of authentication you want to be proxied to NPS. This case it will be 802.1x
- Add a new RADIUS server and configure the same shared secret that you have defined in NPS
- Save and enforce. Now all 802.1x authentications will be proxied to the NPS server for authentication