There are a couple of ways to check the progress of initial replication. You can either use the Event Viewer snap-in or WMI to check whether your replicated folders have finished initial replication.
Event Viewer: A separate event (4104) is thrown for each replicated folder on each downstream partner. For example, if there are three downstream partners with four replicated folders each then a total of 12 events will be thrown on all downstream partners.
Open the Event Viewer snap-in on the server, navigate to the DFSR event log, and then check the 4104 events for your replicated folders.