Win2K Standard Server & a Backup Server

Hello,

I have recently installed a win2k server promoting the old NT4 PDC. Now AD has been configured successfully…..am facing the following issues

1. During the W2k AD installation of very 1st time I have renamed the domain from abc to xyz.com coz my first domain name was not fully qualified domain name now when I add some new user it is no more getting authentication from abc but xyz.com how this delima can be solved?

2. As there’s no concept of BDC in Win2K, if my fist DC got crashed (Blue Screen of Death) than what to do with my existing SAM & SIDs how can I get all the time a mirrored copy of the same server like i do in NT4 BDC & PDC stuff. How to maintain 2 Win2k servers having both user’s sync copies all the time. This is only to get the existing user’s back while my DC is down for any mainteance/repair

Best Regards,

Azam