I recently setup Dynamic DNS updates for Reverse PTR records. The DHCP server successfully updates the reverse DNS records for our domain-joined, Windows endpoints. But, I'm having issues with our OS X endpoints.
Windows Server 2012R2 Roles: DHCP+DNS
DHCP settings I have enabled: Set to always dynmacially update DNS Records Dynamically update DNS Records for DHCP Clients that do not request updates.
DNS: Allow secure and non-secure updates.
Client: OSX 10.14.1