The following is a basic step on how to view the active TLS connections you have on your Lync Edge server to a federated partner.
- Log into a Lync Edge Server
- Open up Performanace Monitor (perfmon)
- Add the following monitor: LS:SIP – 01 – Peers >> SIP – 001 – TLS Connections Active
*Note: By selecting All Instances you will be able to view the amount of open connections to each different domain users are communicating with.
From here you can view the amount of current TLS connections which show how many connections are currently going on.