The Storage Team Blog about file services and storage features in Windows and Windows Server.
If you have custom replication schedules configured that will be in place on Sunday, March 11 at 2AM when DST kicks in, consider the following scenario:
Note how the schedule has not arbitrarily changed to make the replication window 3AM. DFSR does not make any adjustments like AD and FRS replication.Some queued data may replicate during the few seconds of delta between servers (DFSR is very fast, and if the amount of changes is very low, you can expect some of it to replicate - also remember that this is pull replication and the downstream may be slightly different in time than the upstream), but there is no guarantee any data will replicate in this missed 2AM window. In fact, any files created after the window was 'lost' definitely will not be replicated until the next window opens it will be as if the 2AM window never happened. The schedule must be manually adjusted by admins in order to avoid a missed replication window.