You have an Active Directory domain named Contoso.com. The domain contains servers named Server1 and Server2 that run Windows Server 2016. You install the Remote Access server role on Server1. You install the Network Policy and Access Services server role on Server2.
You need to configure Server1 to use Server2 as a RADIUS server.
What should you do?
A. From the Connection Manager Administration Kit, create a Connection Manager profile.
B. From Routing and Remote Access, configure the authentication provider.
C. From Active Directory Users and Computers, modify the Delegation settings of the Server1 computer account.
D. From Server Manager, create an Access Policy.
Configure RADIUS serve to be the Authentication Provider
1. Open the Routing and Remote Access MMC snap-in.
2. Right-click the server name for which you want to configure RADIUS Authentication, and then click Properties.
3. On the Security tab, in Authentication provider, click RADIUS Authentication, and then click Configure.
4. In the RADIUS Authentication dialog box, click Add.
5. In the Add RADIUS Server dialog box, configure the settings for your RADIUS authentication server, and then click OK.
https://technet.microsoft.com/pt-pt/library/ff687693(v=ws.10).aspx