With AutoCAD based products, the Network License Manager can be configured to reclaim a license when a client workstation is idle for longer than a defined time-out period, or the connection with the workstation is lost.
For complete description and configuration tip from AutoCAD Services and Support click here.
Applies to:
AutoCAD 2011
AutoCAD 2010
AutoCAD 2009
AutoCAD 2008
AutoCAD 2007
AutoCAD 2006
AutoCAD 2005
AutoCAD 2004