Lync Server 2013 introduced Centralized Logging. Each Lync Server runs a service that can receive commands from any other Lync Server to enable logging for troubleshooting scenarios. For Edge Servers, you must make sure that port 50001 to 50003 TCP is open from your Front End Servers to each server in the Edge Server Pool. These ports are used to communicate centralized logging commands. Windows Firewall is modified as part of the installation; however, these ports must be considered for any other firewalls in the environment. The following example uses centralized logging to collect data on an Edge Server Pool:
1. Open the Lync Server Management Shell.
2. Navigate to the CLS directory, which by default is