Having a second around provides redundancy and allows you to actually do things on your DCs patches come to mind without having downtime. Also, why do you want to demote this at all? In general, as a sysadmin, you shouldn't be making changes for no reason. If there isn't a good reason to do something, don't do it.
Why do you want to demote this DC, and what do you think you'll gain from doing it? I'd bet that even if this goes off smooth as silk, you'll be putting yourself in worse position than if you hadn't done it all, which should be plenty of reason to reconsider this action. Follow the instructions Importtant a new domain must be like : xy.
Then restart and the domain controller will work I hope this will help many users Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Demoting Domain Controller Ask Question. Asked 9 years, 6 months ago. Active 8 years, 9 months ago.
Viewed 40k times. Improve this question. George George 4 4 gold badges 18 18 silver badges 40 40 bronze badges. Of course, the one time you run into an unexpected issue or something goes horribly wrong, would be the one time you don't have anyone around who knows AD well enough to pull your collective butts out of the fire How many DCs do you have?
Two, this one would have been a third one temporary anyway , the plan was to demote one of the other two. There was a long story behind why, but we decided to decommission this one instead. To start the decommission process, remote on to the existing domain controller as a domain admin and run a command prompt as the administrator.
Type in dcpromo. This will begin the Active Directory Installation Wizard. On the next screen, Active Directory will pop up a warning that a Global Catalog server needs to be made available. If the existing domain is still in use, do not decommission the existing domain controller until a new domain controller is added to the environment.
On the next screen, Active Directory Insatllation Wizard will prompt to specify a new local administrative password. On the next screen, one final prompt will appear before the Domain Controller is removed from the environment. At this stage, Active Directory will begin the process of removing the domain controller from the domain.
This typically takes about five minutes, but can take considerably longer on slow machines or large environments. Once the machine has been rebooted, Active Directory Domain Services will have been successfully removed. The old domain controller must be deleted manually. Please submit exemption forms to accounting interworks.
InterWorks uses cookies to allow us to better understand how the site is used. By continuing to use this site, you consent to this policy. Review Policy OK. The error can occur while the demotion process is attempting to stop the NETLOGON service, however the stop request times out, you get a message indicating that the operation has completed, but then an error on the next immediate line and your demotion stops.
When I first did this, I figured that the dcpromo process would be aware of the last failure, and retry, which is sort of the case except you get the following error.
The wizard cannot access the list of domains in the forest. The error is: the interface is unknown.
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