In a load test, there are a number of virtual users. Virtual users are different from simultaneous users that are actually actively doing something against the server (exclusing VUs that have not logged on, as well as idling VUs even though they have logged on to the system). What's the best way to estimate min/avg/max simultaneous users for a load test?
Is there something specific required for the test or tests you are executing? As to the original quetion.... I'm not sure but i think if you use the 'Candle with Sticks' graphical feature, I think this is possible when analysing the post execution results.