At this point, your design needs to be reviewed and affirmed by just about everyone in the company. When you schedule these design review meetings, take a tip from Arlo Guthrie in "Alice's Restaurant." Come prepared with lots of pictures that have circles and arrows and a paragraph on the back explaining what each one of them means. I have also had good luck by supplying lots of Krispy Kreme donuts and espresso. Caffeine, sugar, and saturated fats always speeds up the approval process.
It's time to begin deploying Windows Server 2003 domains. The next chapter covers installation details for upgrading existing classic NT or Windows 2000 domain controllers and promoting new Windows Server 2003 domain controllers. It also covers shifting from Mixed, Functionality Level 0 to Native, Functionality Level 1 and migrating users, computers, and groups between domains.