Microsoft Active Directory uses a multi-master replication model in which data can be written to any zone that is stored in Active Directory. A Windows administrator can manage any writable copy of a zone from the MMC.
Address Manager on the other hand, uses a deployment model in which resource record data is deployed to a designated Active Directory integrated zone. After deploying the data to the designated servers, Windows replicates it to the other zones. Address Manager includes a feature called AD-Elect which allows the administrator to designate the server to which the data should be deployed.
Only one DNS server can be designated as the AD-elect per zone. When configuring the zone, the user determines which server should be AD-Elect. During an import, the first server from which we import is the AD-Elect server.