What is impact if remove NPS and DHCP server from domain

Question

I have a DC which is hosting NPS and DHCP roles. I have to demote this domain controller to migrate it to new OS 2019. So you know after demoting DC, it will be out of domain. So will NPS and DHCP work in work group?

Answer 1

Simpler / safer solution may be to move these roles to a member server.

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Answer 2

Hi,

Thanks for posting in Q&A platform.

NPS server must be joined into a domain to work. When you deploy Network Policy Server (NPS) as a Remote Authentication Dial-In User Service (RADIUS) server, NPS performs authentication, authorization, and accounting for connection requests for the local domain and for domains that trust the local domain.

You must decide in which domain the NPS is a member. For multiple-domain environments, an NPS can authenticate credentials for user accounts in the domain of which it is a member and for all domains that trust the local domain of the NPS. To allow the NPS to read the dial-in properties of user accounts during the authorization process, you must add the computer account of the NPS to the RAS and NPSs group for each domain.

DHCP server can work accordingly in Workgroup environment unless there is an authorized DHCP server in the domain already.

Best Regards,
Sunny

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