The FlexNet licensing service must be installed as a separate stepįollowing install of the ArcGIS License Manager setup, both for clean installs or for in-place upgrades of the software. Important: Starting with ArcGIS License Manager 2019.0 (Linux platforms only), Before installing ArcGIS License Manager 2023.0, please review the System Requirements. You do not need to uninstall existing ArcGIS software products to install the license manager, but you do need to uninstall 10.4 or older versions of the license manager to install the latest version.