We have a single forest with 2 domains, the root domain and a child domain. We have tried to remove the child domain but without success. All but one domain controllers in the child domain were demoted gracefully, but when I came to remove the last domain controller, and ticked "This is the last domain controller" it refused, saying there were other domain controllers still in the domain.
I have used ntdsutil as per intructions on Q251307 but the domain refuses to go away. I have manually removed the last domain controller from the Directory using NTDSUTIL and tried to delete the domain, but I get an error:
"DsRemoveDsDomainW error 0x2162(The requested domain could not be deleted because there exist domain controllers that still host this domain.)"
Can anyone offer any advice? I have issues in that some of my remote DCs are refusing to become GCs because it is trying to host a partion of the child domain but cannot. i thought removing the domain would resolve this issue but it hasn't.
Any advice greatly appreciated.