Understanding Replication Latency
Administrators who are not accustomed to AD DS replication topology might become confused when they make a change in AD and find that the change is not replicated immediately across their environment. For example, an administrator might reset a password on a user’s account, only to have that user complain that the new password does not immediately work. The reason for these types of discrepancies simply lies in the fact that not all AD changes are replicated immediately. This concept is known as replication latency. Because the overhead required in replicating change information to all DCs immediately is large, the default schedule for replication is not as often as might be desired. Replication of critical information ...
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