UPDATE: DCHP Not Authorized Error in MOM

Ran across another situation with yet another fix (3rd fix) for the "DHCP Not Authorized" error we frequently encounter with the DHCP MP. I've run across this error several times, where a DHCP server shows its not authorized and it actually is, and there are a couple of fixes I've used to beat it. 1st fix 1. Make sure in the Onepoint database, Computer table, that the FQDN is populated for all managed computers. If not, open the table in Enterprise Manager and add the correct DNS suffix to FQDN column, and while you're there, make sure the HOST column is populated with appropriate FQDN of the computer 2nd fix If that doesnt do the trick, try the following: I have seen many people have problems with the DHCP MP in the fact that the state script that runs says that a DHCP server is not authorized even though it actually is. I had this problem in my test environment recently even after it was working successfully for months. Anyway, I was able to fix this with a couple of steps and I can't confirm that each step is necessary, but I know that it worked in my case. I originally tried to reinstall the MP, but I still was seeing the same issue. So, I then took the following steps to resolve the issue: 1. In the MOM Administrator Console , add the problem DHCP server into the "Excluded Servers" list for the DHCP Computer Group (2000 / 2003) and commit changes. 2. Run MOMInfo.exe /clearqueue command on the DHCP server having the problem. (MOMInfo is available in MOM 2005 Resource Kit). 3. Remove the problem DHCP server from the "Excluded Servers" list for the DHCP Computer Group (2000 / 2003) and commit changes 3rd fix A 3rd situation popped up a few weeks ago were a user had stale entries in the directory for servers showing as authorized, but that were no longer in service or had undergone a name change, causing MOM to throw the "DHCP not authorized" error. Steps are as follows: assumes you have the appropriate level of permissions (Enterprise Admins in this case) 1. Open ADSIEdit 2. Expand the Configuration NC 3. Expand Services, then expand Netservices 4. Scroll down in the right pane until you find the object with DN containing CN=DHCPRoot 5. Right-click on DHCPRoot and select Properties 6. In the list of attributes, scroll down to DHCPServer 7. Select DHCPServer and click on the [Edit] button 8. This will show you a list of the authorized servers 9. Look for any entries for servers no longer in service, renamed servers, etc. This will remove entries which are actually not listed within Netservices as authorized DHCP server(s) but which show up in the DHCP MMC as an authorized server.