lmutil.exe, which is available in the SYSAM-x_x\Bin folder provides various diagnostic possibilities.
For example, the following command can be used to find the user(s) who have currently borrowed the license(s):
lmutil lmstat -a -c <port>@<host> where <port> and <host> are license server information.
For detailed information about lmutil, follow the SySAM Documentation Collection link available at http://www.sybase.com/sysam.