Migrated users/computers to forest (abc.local) from 2 Child domains (123.abc.local & 456.abc.local). I want to demote the child domain and bring them back into the forest.

I migrated users/computers to forest (abc.local) from 2 Child domains (123.abc.local & 456.abc.local).  Which went very well using the ADMT.  I want to demote the child domains and bring them back into the forest.  Is this as easy as running DCPROMO to demote and then bring the servers back up using DCPROMO again under the forest (abc.local)?  Is there something I am missing here?  Any insight or "20/20" hindsight is appreciated.  I need to do this task in the next couple of days so please reply ASAP.  Because of the ugent need, 400 points.
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.

step one is to demote the servers yes,

make sure you run the NTDSUTIL and clean all your metadata


this way when you promote back in you are effectively promoting a clean server

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
If DCPROMO is successful, then AD should be clean and there should be no trace of it on the demoted server.  Of course, it doesn't hurt to look around with NTDSUTIL or ADSIEdit.

Make sure to delete ALL DNS records for the demoted servers from EVERY container in every zone.

You have the idea.

hmm i found that if i demote a DC and it is successfull, yet i promote the server again, a lot of old directory data is kept, which is the only reason i pointed out the metadata cleanup tool    also i found numerous times that even though demotion says it was succesful there were records in sites and services
Active Protection takes the fight to cryptojacking

While there were several headline-grabbing ransomware attacks during in 2017, another big threat started appearing at the same time that didn’t get the same coverage – illicit cryptomining.

That can be the case if you have a few DCs that hold onto replication data for a period.  It sure won't hurt to look into the metadata for peace of mind.

Ah..yes, Sites and Services hold onto the servers - never could figure that one out...deleting from the console seems to solve this.  Good point though.

was always scared to delete from S&S but when i did i found it worked a charm also   good old windows bugs
n2itAuthor Commented:
Thank you both for your time answers.  Currently, I am not running DNS on this DC but with a clean down and up I will install later this week.  I plan on running this tonight in our smallest office setting so I will let ya know.
excellent, good luck
n2itAuthor Commented:
Status...  Ran out of time last night with other issues unrelated.  Trying again tonight.
n2itAuthor Commented:
Ran this last night and all appears to be OK.  I want to thank both of you.  You guys take time out of your day to help us that are not as advanced or have the time or resources to test prior to running.  So here's to ya and thanks for giving back to your profession (assuming this is your profession).

glad it went well mate

thanks for your words to :)
Glad to help!
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 2003

From novice to tech pro — start learning today.