Decommissionig a Global Gatalog, Domain Controller properly

Greetings Experts,

I have a physical Domain Controller (DC) which is also a Global Catalog (GC) and DNS server  and I want to decommission and format him (currently Windows Server 2008 R2).

For that reason I created a Virtual DC ,GC and DNS Server and I transferred all roles and promote him as primary DC (Windows Server 2012 R2).

I was reading that is recommended ,before decommissioning a DC Server, to shut him down for a week or two, confirm that the new DC is working with no errors and following decommission the subject server.

Unfortunately I do not have this time for waiting since the server should be formatted and revert to production as soon as possible.
For that reason I have changed all the clients to point to the IP of the Virtual DNS in order to check how they operate and I also unchecked the physical Server from operating as GC.

Is there any other recommended method prior to decommission process in order to confirm that…..:
-       the physical DNS/DC is not being used anymore (does not have any records that could cause any errors once decommissioned)
-       The virtual DNS/DC/GC is working in his place
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.

RantCanSr. Systems AdministratorCommented:
Set your DHCP lease time to a few hours, and ensure that the DHCP is handing out the new DNS. If you have transferred the FSMO roles to new DC, you can demote the old DC anytime.

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
mamelasAuthor Commented:
Dear RantCan,

Thank you for your prompt reply.

The FSMO roles are already moved on the Virtual DC.
Will the replication between the Domain Controllers stop automatically after decommissioning the Physical Server?
Or should I stop it manually ?
RantCanSr. Systems AdministratorCommented:
DO NOT use manual intervention.

Use the DCPROMO command to demote the old DC; it will take itself out of commission. Here are some details.
mamelasAuthor Commented:
Thank you for your time!
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.