This article includes information on how to enable and disable ArcInfo Workstation's extensions. Use this when a license must be released to the available pool so that other users may access it.
PRODUCT GRID AVAILABLE
PRODUCT GRID DISABLED
This will cause the product to give a licensing error when an attempt is made to start it:
You are not licensed for Grid - GRID not run.
Get help from ArcGIS experts
Download the Esri Support App