Ntdsutil Remove Crashed Domain Controller Step by Step

Ntdsutil.exe is a command-line tool that provides management facilities for Active Directory Domain Services (AD DS) and Active Directory Lightweight Directory Services (AD LDS). You can use the ntdsutil commands to perform database maintenance of AD DS, manage and control single master operations, and remove metadata left behind by domain controllers that were removed from the network without being properly uninstalled. This tool is intended for use by experienced administrators. (Ntdsutil @ Technet)
First I will run below command to get all the domain controllers installed on the domain.
netdom query dc

Run below command to get FSMO role holders in a domain.

netdom query fsmo

Now open the command prompt with administrative rights and follow below commands to remove a crashed domain controller from the domain.

ntdsutil
metadata cleanup
connections
connect to server <other active dc name>
q
select operation target
list domains
select domain <number> (the domain number shows after above command)
list sites
select site <number> (site number shows after above command)
list servers in site
select server <number> (the dc number which is going to remove and appeared in above step)
q
remove selected server

See the domain server name carefully and click Yes.

Selected server removed from the server.

Go to Active Directory Users and Computers and remove the same server if it still showing in the controllers.

Go to Active Directory Sites and Services -> Site name -> Servers and remove the crashed domain server.

Open DNS Manager and remove DNS records as shown in below two screen shots.


Let’s run netdom query again to list out all domain controllers in the domain.