If you require this specific legacy version for compatibility with older projects, follow this guide on how to access the installation files.
: Under the "My Organizations" tab, select "Downloads" . download arcgis 10.6
is enabled. Failure to do so may result in connection issues or application crashes when accessing online data or services. Esri Australia Technical Blog Essential Resources ArcGIS Enterprise Stable? - Esri Community If you require this specific legacy version for