How many users are logged on

From: Dan (gill_daniel_at_yahoo.com)
Date: 02/05/04 

Date: Thu, 5 Feb 2004 11:39:10 -0500

I have SBS2000 with a 40 user license. How/Where do I determine how many
users are logged on at any given time? Or see how many of the 40 licenses
are in use?

Dan