We have the Endpoint Security add-on enabled which has a feature called "Port Audit". This scans network ports on the managed computers and spits out a report of which ports are open.

Normally this would be fine except we have an internally used chat application called oMessenger which has a meltdown when there is a port scan on any computer where it is installed. The message from the application is "Socket Error Receiving From @" and appears for many users, many times a day. I checked and we are already using the latest version of the application.