Are the ArcGIS extensions available as single use and concurrent use licenses?
Yes, the ArcGIS extensions are available as single use or concurrent use licenses. Note: The licensing options for the ArcGIS extensions must match the licensing options for ArcView. This means that an ArcGIS extension single use license can only be used with an ArcView single use license and an ArcGIS extension concurrent use license can only be used with an ArcView concurrent use license.