Required Subscription: Mitel MVCCC
Required Permission Level: Administrator
Mitel (ShoreTel) does not provide a way to see what is using real-time event feed licenses. It is based on concurrent connections, so it doesn't matter if you have three licenses and three event-feed credentials set up — one application could connect using the same credentials three times and take up all your event feed licenses.
The only way to see what is connecting to the real-time event feed is to run this command on the Mitel MiVoice Connect Contact Center (MVCCC) / ShoreTel ECC server:
netstat -n |findstr :31456
That will show everything on your network connecting to TCP port 31456, which is the Real Time event feed TCP port. Look for addresses with :31456 in the LEFT column adjacent to "TCP" — there will be some entries with :31456 in the RIGHT column (adjacent to "ESTABLISHED"), but those are connections to the local computer and are already accounted for in the corresponding LEFT column entries.
For example, running that command on an MVCCC (ShoreTel ECC) server produces something like this:

In this example there are two connections: one from 127.0.0.1:55510 and one from 10.10.10.156:12832.
To identify what those processes are, go to each of those computers and run:
netstat -n -o |findstr IPADDRESS:PORT
where IPADDRESS:PORT is from the output above.
For the local computer connection, running that command produces:

For these results, look at the entry with :31456 in the RIGHT column (adjacent to ESTABLISHED) to identify the process ID. In this example the process ID is 9088. Checking Task Manager shows that is ecc_ruby.exe, which is part of MVCCC (ShoreTel ECC) itself — likely the native agent dashboard support:

For the remote connection at 10.10.10.156, running the same command there produces:

Checking Task Manager for process ID 17116:

In this case it is the Brightmetrics Agent Service. If you don't recognize the executable, you'll need to do a bit of additional digging to identify it.
If you have any questions regarding Brightmetrics' Mitel (previously ShoreTel) Reporting and Data Analytics Services, please email us at support@brightmetrics.com.