Network Migration Rule #1 == PLAN everything out first.
Other rules include:
- don't make work harder for yourself than it needs to be by changing the domain name
- Microsoft does in fact make tools to upgrade Win2K AD/domains to Win2K3 so that you don't need to migrate to a whole new server, etc.
- don't make your users do anything to complete a transition
- migrate everyone at the same time--especially internal email
- don't do the migration during the middle of the day on a business day--get your butt into the office on the weekend and take care of it then
- don't piss off people that are higher on the food chain than you are
