use putty to connect via ssh or if in vSphere open a console session
log in as root
you need to run vi
if your network it is on begins 10. the file you need to edit will be called /etc/systemd/network/10-static-en.network
if your network is on 192. most likely it will be called /etc/systemd/network/192-static-en.network
move cursor down and to end of last line (which in my case was DNS=) and hit lower case o
this adds a new line
Domains=<mylocaldomain>
make sure you have your full domain instead of the <> placeholder (in my case domain.local)
Check for typos if all good enter a colon followed by wq
:wq
to write out the file to disk and quit VI
you can then use the commands to restart the service daemon or simply go the whole hog as I did
type reboot
that should do it.