Lync Edge and Replication
When setting up Lync, one question that is commonly heard is how does the Edge server get updates from the Central Management store? This is a great question because the Edge server is not domain joined and in order to install the role, you have to export the Topology and import it manually on the Edge server. People begin to wonder if they will have to remember to do this each and every time they make a change to the Topology on every Edge server and start to get worried.
There is good news! After you have installed the Lync Edge role, so long as the Front-end can talk to the Edge on port 4443/tcp then the Lync Replication service can update the Edge server when the topology changes. This means that in order for replication to work correctly, you need to make sure you have port 4443/tcp open on your firewall from the Front-end to the Edge Server(s).