A network license is reclaimed by the license server by default after 15 minutes of idle time.
MotionBuilder Preferences
A lost license server connection is detected after two minutes. Following this "disconnect" event, MotionBuilder attempts to recover the license. If the license connection cannot be restored within the 120-minute "Recovery Period", a dialog appears stating two hours have passed since the connection to the license server was lost and the application will exit in 10 minutes. The 10-minute "Grace Period" begins after you click OK. You can save your work during the "Grace Period".
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