How to merge 2 domains together

We have a customer who bought out another company and merged.

Right now we have both companies in the same building. they are both on different routers and different IP' ranges.
192.168.16.0 and the other is 192.168.1.0

They both have their own domain controllers.

We are going to be bringing them on all the same network.

The company that was bought out uses a sql database program called Miracle.
all the client workstations have the Miracle executable and it is pointing to the database of the server using the Host name not the IP of the server.

Our question is is it possible to demote the server which is now a DC and add it to the main network at a child server?.

or can we just bring the server to the other network as a DC but turn off DHCP and DNS server?
BBraytonAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Brian BEE Topic Advisor, Independant Technology ProfessionalCommented:
You can't merge domains, as in join the resources together. I suppose you could demote the old DC and then join it to the new domain, though I might suggest rebuilding it after you demote it, just to make sure the OS is clean.

You might want to read up on domain trusts though. I think that is what will work the best until you get everything moved over to the new domain.

As for the Miracle database, you can always manually add a DNS entry for it to the new DNS server.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Konstantin KrolikovCommented:
You may do uplink between them and create forest trust. This will give users and resource trusts to interact on both networks.
About DNS you may configure secondary zone on both domain controllers of each others primaries zones.
At later point you can change UPN's for users like login with USERNAME@NEW-DOMAIN.net instead OLD-DOMAIN.

But as merge you will need to choose one of your forests to be primary for your self, leave old one and to join all resource, hosts to new domain.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
dcpromo

From novice to tech pro — start learning today.