Old Domain Controllers Showing as Authorized Servers

Question

I have 2 old domain controllers that no longer exist showing in the "Manage Authorized Servers" in "DHCP", when I try to unauthorize them I get an error that says "There is no such object on the server."

Answer 1

Try right click on ADSI Edit and click connect to. In connection settings, connection point, select or type a Distinguished Name or Naming Context. Enter CN=NetServices,CN=Services,CN=Configuration,DC=Your Domain,DC=com then click ok.

Expand the default naming context, highlight the path in the left pane, and you should see CN=DhcpRoot on the right.

Double click it, and then check for and edit the dhcpServers attribute to reflect the correct computers. The restart DHCP service.

--please don't forget to upvote and Accept as answer if the reply is helpful--

Answer 2

When you open? or when you type in the Naming Context? If the latter then there may be a typo in the path

Answer 3

Ok, good. Then you can double click CN=DhcpRoot on right then scroll down to dhcpServers attribute and edit to reflect the correct computers. Then restart DHCP service.

--please don't forget to upvote and Accept as answer if the reply is helpful--

Answer 4

from dhcpServers attribute? Yes. I'm glad to hear the issue is sorted. I'm not sure why the active ones are not listed. Another check is from PowerShell
Get-DhcpServerInDC

Answer 5

Ok, yes and I think you'll need to restart the DHCP service as well after removing the bogus ones.