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."
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."
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.
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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!
It's safe to delete the old domain controllers after entering the current ones right?
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
When I run that command it lists the 2 current ones and the 2 old ones, but I haven't made the changes yet.
Ok, yes and I think you'll need to restart the DHCP service as well after removing the bogus ones.
Is it also safe to delete the old CN=olddomaincontroller.mydomain.com record that's listed under the CN=DhcpRoot file?
So to clear it's in the CN=NetServices container and the domain controller is gone anyway then yes it should be fine.
Okay thanks. Now when I run Get-DhcpServerInDC it shows the current domain controllers but they are listed twice. Is that okay?
Did you manually add them also to dhcpServers attribute? At some point I think the location changed. The active ones are also in CN=NetServices right? I think that is sufficient to have them in in CN=NetServices.
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