In addition to the two RFC-compliant zone transfer methods, Windows Server 2003 DNS zone can be integrated into Active Directory. This eliminates the need for conventional zone transfers because Active Directory is replicated using its own multiple-master replication scheme.
Active Directory integration also makes it possible for any Windows Server 2003 or Windows 2000 domain controller that is running DNS to update the zone.
The DNS service requires very little overhead, so you can easily deploy DNS on every domain controller. In terms of performance, bandwidth utilization, and manageability, integrating DNS into Active Directory is a win. There are a few caveats, however:
No ASCII zone files. Resource records are ...