In a large environment that may have domain controllers spread out across a WAN, you do not want to begin your Win2k implementation at your main site and have any of your W2k clients "run home" to this DC. It will overwhelm the DC and could cause login scripts to break and slow access times.
The fix is to add a registry hack that will cause the DC to look like an NT 4.0 PDC, and therefore your Win2k clients will authenticate with their normal or closest DC. This will cause one issue in regards to bringing up more Win2k DCs into your domain. You will get an error that there are no Active Directory domains. The second registry hack will solve this problem. You will need Service Pack 2 for both of these.
First registry hack:
Second registry hack: