Yes. You can use Network Policy Server (NPS) as the identity provider (IdP) for Rublon Authentication Proxy.

In this scenario:

1. NPS is added to the Rublon Authentication Proxy configuration file as if it was a RADIUS server.

2. NPS communicates with a RADIUS server (such as FreeRADIUS) or an LDAP server (such as Active Directory) to pull users.

Helpful Links

Is There an Alternative to Windows NPS?