You can try the command line tool LMUTIL.EXE like this:
LMUTIL.EXE lmstat -a
But it does not always return all servers.
Jimmy Bergmark
JTB World
http://www.jtbworld.com
JTB FlexReport - network license reports
http://www.jtbworld.com/jtbflexreport/index.htm
Jimmy Bergmark
JTB World - Software development and consulting for CAD and license usage reports
https://jtbworld.com