Alternatively, if you had an offline BDC somewhere, you could promote that to a PDC and upgrade that after you correct the FQDN issue. You can use a tool called NetDIAG.exe from the support tools to check on other causes of not being able to register DNS names. To force re-registration, use IPCONFIG /RegisterDNS form the command line.
Dig deeper on Microsoft Active Directory
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.