For DFS replica sets, FRS uses the connection objects, topology, and schedule built by the Distributed File System snap-in. However, a schedule for a DFS replica set can be assigned globally to the replica set or overridden on each individual connection. Generally, it is preferable to change the schedule on the replica set, unless you specifically want to have exceptions or want to stagger schedules. Connection object schedules override a schedule assigned to a replica set.
For example, assigning a schedule to the replica set might be more appropriate for a replica set with a large number of replicas, because it would be a tedious process to configure the schedules on all of the connection objects for a replica set with over 100 members.
You schedule replication for a DFS replica set by making replication either available or unavailable. When set to available, replication occurs four times per hour at 0:00, 0:15, 0:30, and 0:45, which is essentially continuous replication. Unlike SYSVOL replication, replication for a DFS replica set stops after the schedule closes, even if all changes have not been replicated.
To view or change the schedule on a connection object for a replica set in Windows 2000
Note again that if a schedule is assigned to a connection object within this replica set, it overrides the schedule assigned to the replica set.
To view or change the schedule on a connection object for a replica set in Windows Server 2003