How Often Do Domain Controllers Replicate

By default, domain controllers replicate schema and configuration information once an hour. (For information about the type of data replicated, see the FAQ How does intrasite replication work in Windows 2000?.) To change this interval for domain controllers in one site, perform the following tasks.

How often does replication occur between domain controllers?

How often does AD replication occur? Intra-site replication: With the exception of critical directory updates that are replicated immediately, the source DC updates changes to its closest replication partner every 15 seconds.

How often should Active Directory replicate?

By default, AD is scheduled to do inter-site replication every 180 minutes (three hours). This makes sense if your AD is enormous and one or more of your sites happens to live on the other end of connectivity from the past.