Remove Child DC from Domain (unable to dcpromo)

Hi Guys

So i have lost two child domains and an exchange server today.


So i have lost child 3, which had a child domain of its own child 4, the servers are physically gone, we have 0 backups.
i jus tneed to ensure that we maintain child 1 and 2 and main domain functionality.

i dont want to be loosing any more emails etc

each domain has its own exchange server.

my question is where do i start?
i need to remove child domains 3 and 4 i would normally do this by dcpromo but obviously that is not an option?

im server 2008 all round with the odd member server being 2012.
i inherited this system with no documentation so im in real need for some help.

i was lookng here
but as step 2 says "Verify that all servers for the domain have been demoted."

i am not sure because obviously they have not been demoted they are just gone.

any help will be greatly appreciated
Who is Participating?

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

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.

Dirk MareSystems Engineer (Acting IT Manager)Commented:
First start by removing the DC's for those domains.
Remove DC

Second remove all the child domains.
Remove child domain

You need to do metadata cleanup of all the DC and child domains, ensure no "old/missing" dc or child domain entry exists.
Video removing Metedata


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
Will SzymkowskiSenior Solution ArchitectCommented:
You will also need to create new mailboxes on the Root domain or where you want to put them and import the data back into them as well.

deepslalliAuthor Commented:
Hi Dirk

I am running through step one;

however on step 12.

i am told that i must be connected to a server on the same domain. In this case this is not possible it was a 1 DC environment no other member servers or dc's for this particular child domain?

is their a work around? the same will be true for the other domain i need to remove. no longer any DC or member server's available.

please forgive the crude topology in paint but i have nothing else.

So as you can see - did have 3 DC's these are all gone. the entire office is gone no access in or out.
and SG's child is exactly the same.

so i have DCDomain / UK.DCDOMAIN / IN.DCDOMAIN remaining and im assuming i need to remove sg and my from the directory. without access to any server on them particular domains

*Do i delete the server manually from Ad sites & Services, then go on to delete the domain via ndsutil.exe?
Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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
Windows Server 2008

From novice to tech pro — start learning today.