recently we changed ip range. It was rough but got it done.
There was an issue with the PDC not wanting to change IP.
I ended up promoting another DC to PDC.
The Old PDC ended up getting a dcpromo /forceremoval
Add remove programs DNS and WINS.
The network is static. I am still not able to change the IP information.
with in the GUI I change the IP, Subnet, Default Gateway and the DNS to the new correct settings.
When I close the dialog window and reopen it is back to the original configuration.
After changing when I do a reboot it diverts back to the old DNS settings.
It appears that I cleared roles properly with the dcpromo /forceremoval since when I try a ntdsutil metadata cleenup then connections it will not get past that point when looking for the server to connect.
A DCdiag.exe says the DC cannot be found.
More or less I just need to Change the IP on this server 2003 SP2 system to rejoin it to the domain then re add AD and DNS.