Contact

Subscribe via Email

Subscribe via RSS/JSON

Categories

Creative Commons Attribution 4.0 International License
© Rakhesh Sasidharan

Elsewhere

Event ID 1046 – DHCP server says it is not authorized even though it is authorized!

This problem ate my head for the past 2 days and wasted a lot of time. For such a simple issue it drove me quite mad.

Built a bunch of DCs for our branch offices. One of them gave trouble with the DHCP server. I authorized it successfully, but the service kept complaining that it wasn’t authorized. Event ID 1046.

The DHCP/BINL service on the local machine, belonging to the Windows Administrative domain mydomain.dom, has determined that it is not authorized to start.  It has stopped servicing clients.  The following are some possible reasons for this: 

This machine is part of a directory service enterprise and is not authorized in the same domain.  (See help on the DHCP Service Management Tool for additional information). 

This machine cannot reach its directory service enterprise and it has encountered another DHCP service on the network belonging to a directory service enterprise on which the local machine is not authorized. 

Some unexpected network error occurred.

Did the obvious ones like reboot server :p and restart service :) and un-authorize and re-authorize the server (no errors either time). Also went ahead and removed the role itself and added back. Nothing helped!

Found a helpful post finally that pointed me in the right direction.

  1. I un-authorized the DHCP server.
  2. Opened up AD Sites and Services. 
  3. Browsed to the Services section (which can be enabled from the View menu if not already visible). 
  4. Browsed to the NetServices section within this. 
  5. On the right pane I had an entry for the IP address for the DHCP server I was trying to authorize. Not an entry by name, but by IP. Dunno why. (All other entries were by name, so I am guessing this is a leftover or a mistake by someone in the past). 
  6. I deleted this entry. 
  7. Waited a while, and then authorized the server. 
  8. No errors now!

Screenshot of the offending entry just for the heck of it (the blacked out part was an IP address):

Alternatively one can open ADSI Edit and go to CN=NetServices,CN=Services,CN=Configuration,DC=myDomain,DC=dom. Then delete the entry (as above) from there. 

What’s odd in my case is that the IP that I deleted was assigned to the DHCP server I wanted to authorize. Am guessing the CNF (short for conflict?) following by the GUID indicates some issue.

Event ID 1046 – DHCP server says it is not authorized even though it is authorized! by rakhesh is licensed under a Creative Commons Attribution 4.0 International License.