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

I don't have CN=DhcpRoot listed when I try that.

Answer 3

When I try to connect in ADSI Edit it comes up with the error "Operation failed. Error code; 0x202b. A referral was returned from the server. 0000202B: RefErr: DSID-0310082F, data 0, 1 access point ref 1: 'your domain.com'

Answer 4

That's what I was doing wrong, I wasn't putting our domain name in. I'm sorry. Okay now a see CN=DhcpRoot, under that I see 3 CN=domain controllers. 1 of them is the old domain controller that no longer exists, 2 of them are the current domain controllers.

Answer 5

I noticed it doesn't have our current domain controllers listed in the dhcpServers attribute, it only has the old ones. I wonder how DHCP has been working all these years with that being wrong?

Thank you very much for your help on this issue that's been bothering me for so long!