How to add a dns record for a device outside the domain?

Question

Domain Name System

Good afternoon
There is a main office and branches, different subnets, vpn, dhcp on mikrotik, dns on win server and AD.
There is a 1c server in the head, not brought into the domain.
There are clients in a remote branch, in AD firma.local
How to add a dns server record to a windows server?
Now it is added as static to Forward Lookup Zones - firma.local - Static entry 1s IP. But it has a fully qualified domain name 1c.firma.local.
In this case, after turning on the PC at the remote branch, for some time the PC cannot get the ip of the 1s server. After some time, he gets it.
As a crutch, of course, there are hosts .....

Answer 1

point him to a dns server that knows about the domain?