Hi,
Hold on just a sec before you start right clicking domain controllers
from ADUC or ADSIedit.
First and formost by using NTDSUTIL go through a metadata cleanup to
make SURE there is no DC;s that should not be in the metadata.
THEN go into ADSIedit and remove any information pertaining to this
old DC. (all mentioned in the article below)
There is more to remove in ADSIedit other than just the computer
object if this DC was not removed correctly.
Verify that this machine did not hold any FSMO roles and if so, seize
the roles to a working machine or better transfer. I doubt you will
be able to transfer them.
I would imagine that if this did hold any of the FSMO roles you would
have seen some weird things going on already.
Perform a metadata cleanup via NTDSUTIL from the support tools.
Go through ADSIedit to remove anything pointing to this old DC. (again
all in the doc)
Go thorugh DNS and remove any records there plus double check under
the Name Servers tab.
NOW you can go through Sites and Services and delete anything there
pointing to the old DC. If all the above is performed correctly you
will not have to go to Sites and Services.
Remember, this is just not a petty workstation, this is a domain
controller after all.
How to remove data in Active Directory after an unsuccessful domain
controller demotion
http://support.microsoft.com/kb/216498
Using Ntdsutil.exe to transfer or seize FSMO roles to a domain
controller
http://support.microsoft.com/kb/255504
Good Luck
Harj Singh
Power Your Active Directory Investment
www.specopssoft.com