Microsoft Active Directory Certificate Services is one of essential things for securing that internal communication between servers and clients. It allow the use of things like internal intune configuration, windows hello and secondary factors. there are a lot more uses for this and a lot of how-to guides and documentation for many other types of usage.

Microsoft Learn in particular provides a lot of support guides for this. I have for example used this a lot for VPN Security, Review collected by and hosted on G2.com.

The tool itself is easy to install, but once installed you kind of "what now". there could be updated templates to reflect current usages such as passwordless for example. Review collected by and hosted on G2.com.