Our environments sound very similar, except our ad/dns/dhcp are on 2016 servers. dns dynamic updates, secure only, are enabled. We are using DHCP reservations primarily for printers and access points.

This guide delves into the core components of Linux networking: TCP/IP, DNS, DHCP, and routing, offering detailed insights and practical examples to enhance your understanding and skills. TCP/IP ...

Don't have a DD-WRT router? Get some of the same DHCP and DNS features with a Raspberry Pi.

Gartner, Market Guide for DNS, DHCP and IP Address Management (DDI), Andrew Lerner, Christian Canales, 24 February 2015 Gartner does not endorse any vendor, product or service depicted in its research ...

Anyway, all that is to say, I don´t really know how this problem started, but the DNS and the DHCP on the Windows server is no longer working.