metadata cleanup

We recently added three new 2012 R2 domain controllers to our environment.  We followed all the steps to add them and then remove the three old (2008 R2) DCs.  We believed everything was successful until recently when configuring failover for DHCP, the names of the old DCs were listed as options for the partner server.  This made us think our metadata had not been cleaned up correctly, so we tried to follow the steps indicated in this article to clean up the metadata.  However, in step 2 the old DCs are not listed as an option for cleanup.  I am not sure now whether or not we need metadata cleanup; and if not, why are the old DCs listed when I try to configure DHCP failover?
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.

Seth SimmonsSr. Systems AdministratorCommented:
they may have been removed as domain controllers but not unauthorized as DHCP servers

you can try to unauthorize from the dhcp console or use the command line

Unauthorizie a DHCP Server in AD DS

from elevated command prompt, run:

netsh dhcp delete server <fqdn of server> <ip address>

for example, to remove Server1 as authorized, you would do netsh dhcp delete server

How to Use Netsh.exe to Authorize, Unauthorize and List DHCP Servers in Active Directory

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
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
Active Directory

From novice to tech pro — start learning today.