Demote the Domain Controller, How to Demote the Domain Controller Server 2019
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How to Demote the Domain Controller Server 2019

In this article, I will explore how to demote the domain controller in Windows Server 2019 Active Directory Domain Services (AD DS). Do you want to demote a domain controller?
Is your domain controller having issues and do you need to manually remove it? No problem.

In this article, we will walk through two options to demote a domain controller. If you are able to access the Windows server then the first option is the preferred choice.

Demote Domain Controller Using Server Manager

Microsoft’s recommended this method for removing a domain controller.

Open Server Manager

Click on the Manage tab and then select Remote Roles and Features.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Click on next before you begin the window.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Select the server you wish to demote and then click the next button.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Untick Active Directory Domain Services box.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Click on the remove button to remove features that require.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Select Demote this domain controller

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Note: Do not tick Force the removal of this domain controller box. Only choose this option if you are uninstalling the last domain controller in the domain.

You may change credentials on this screen if required and then click next.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

The domain name system (DNS) server warnings window.

Tick the box Proceed with removal and then click next.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

If you get the DNS delegation option you can choose Remove DNS delegation and then click next. Mostly, you will not get DNS delegation and can untick this box.

Type the administrator credentials and then click next.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Review options and then click Demote.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

After rebooting the server will be a member server.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

You can log in with administrator credentials to the server.

Domain Controller Additional Cleanup Steps

For some cause, Microsoft determined not to include sites and services in the cleanup procedure.

Launch Active Directory Sites and Services and then right-click on the server you want to remove, and click delete.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Click yes

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Confirm Subtree deletion, click yes.

Demote the Domain Controller, How to Demote the Domain Controller Server 2019

Written by Jamil Parvez

Jamil Pervez works as a Network Administrator, based in Kuwait with a Primary focus on Microsoft technologies. Microsoft Certified MCSE, MCTP, MCITP, CCNP, CCIP, CCVP with 20 years of experience in administering Windows Servers, Exchange, VMWare, Veeam B&R, Veritas BackupExec.

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