In the monitor tab go to filters and expand Overview > and select LEM Internal Events
Wait until you see the Event InternalRuleFired with the EventInfo The 'Authentication Traffic but No Agent' rule fired
Pause and select the event (Make sure the event is highlighted)
In the top right hand corner Explore drop down, choose Event and a details page opens with what I believe is the data you are looking for
I use the Air Console but I hope its the same in the browser console