Lync Edge and User Replicator
It seems as the Lync Edge server is running the User Replicator without actually needing it. In some cases it even causes the Lync Server 2013 Access Edge service to fail to start or hang. You can read more about it in the KB article:
Lync Server 2013 Access Edge service fails to start or stops responding after it starts
Now since the Edge server sits in the DMZ, and for performance reasons, you want to run as few services as possible on this server. So, the recommendation would be to always switch off the User Replicator on the Edge server.
Set-CsAccessEdgeConfiguration -EnableUserReplicator $False
Working with the Edge server, many are the occasions when you need to check, and double-check, ports.
This can be done with PortQry and PortQryUI, which is a user Interface for PortQry. This tool gets even cooler if you download a PortQueryUI Config.xml File for Lync from Flinchböt. The config file is for Lync 2010, but can easily be modified to work with Lync 2013.
Happy port scanning!