licenseuse

Many large organizations use a network-based "floating license" for MATLAB, where users must be connected to the FLEXlm license server to run MATLAB. The total number of MATLAB users and users of specific toolboxes is limited by the license. In some cases, a user can obtain a license for MATLAB, but a specific toolbox may not be available because the total number of users for that toolbox has been reached. LICENSEUSE uses the license manager utilities to display the number of users that are currently using a license, and their user names. This can help you find users in your organization who have failed to exit MATLAB and are inadvertently tying up a license.
The companion m-file LICENSEUSER returns the licenses that a specific user has checked out.