After setting up DFS Replication, you get this message:
Replication will not begin until the configuration is picked up by the members of the replication group. The amount of time this takes dependds on Active Directory Domain Services replication latency as well as the polling interval.
Basically this jut means that replication will begin when the replication settings have synchronized on the Active Directory controllers (typically happens within 15 minutes) and other DFS Replication points have polled in.
The message is nothing to worry about, but you can speed it up by initiating an AD replication if you don’t want to wait what is probably another 5 minutes after having read this article 😉