How do I rename a PDC/BDC?

Log onto the PDC as an Administrator

Start the Network Control Panel Applet (Start - Settings - Control Panel - Network)

Click the Identification tab.

Click the Change button and enter in the new computer name and click OK

Restart the PDC for the name change to take effect.

Once the machine has rebooted start Server Manager (Start - Programs - Administrative Tools - Server Manager), if the old name still appears as a Backup, or if there is no entry for the new name:
- Create an entry for the new name. To do this, select Add to Domain in the Computer menu of Server Manager.
- Add the new computer account as a "Windows NT Backup Domain Controller" (it will be added and displayed as a Primary).
- Remove the old name by selecting the entry. To do this, select Remove from Domain on the Computer menu.

Log onto the PDC as an Administrator and in Server Manager (Start - Programs - Administrative Tools - Server Manager) add an account for the BDC's new name

Log onto the BDC as an Administrator

Start the Network Control Panel Applet (Start - Settings - Control Panel - Network)

Click the Identification tab.

Click the Change button and enter in the new computer name and click OK

Restart the BDC for the name change to take effect. The NETLOGON service will not yet start on this server.

On the PDC, open Server Manager. Select the new BDC name and from the Computer menu, choose Synchronize With Primary. This will start the NETLOGON service.

In Server Manager, select the old BDC name from the list and from the Computer menu, choose Remove From Domain.