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I made a goof. I was in RDP and checking out the network settings on one of my domain controllers (Windows Server 2003 SP2) and I accidentally changed the static IP to a different subnet, and poof lost my RDP. There are no accounts set up on it that can log in locally, so I cannot log in to fix the issue. Any suggestions on how I can fix this?

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I apologize it seems the issue wasn't related to changing the IP address, well it was partly. That domain controller became it's own primary after the IP was changed and it seems there were replication problems and it didn't have the new Administrator password I had setup on the primary DC before the mistake. Thanks anyway. Sorry don't have enough rep to answer it myself yet. – NCX001 Jun 2 '11 at 17:26
There is no such thing as a backup domain controller, unless you are in a Windows NT4 environment. – MDMarra Jun 2 '11 at 17:27
If you're still calling an Active Directory DC a PDC or BDC you most certainly should not be touching anything on the server including the IP address information. – Chris S Jun 2 '11 at 17:41
@NCX001, alerting moderators about Chris S's comment isn't going to work - you may think it rude but he's right and this site is for PRO sysadmins, we expect people to keep up. – Chopper3 Jun 2 '11 at 18:13
Ryan - if you've had a year of experience with AD ( a product that's been around for over 10 years), and weren't aware that there's no such thing as a BDC anymore ... I just don't know what to say. – mfinni Jun 3 '11 at 14:27

If you have physical access to the network, you can configure an IP address on a laptop with an IP in the same subnet you accidentally assigned. Try logging in from there.

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This might even work remotely, with the ability to assign multiple IP addresses to one NIC. – RobM Jun 5 '11 at 9:18

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