Software Authorization – Authorization files to license your ArcGIS software are organized as follows:.For previous versions, select ArcGIS for Server.
If you are a current ArcGIS for Server customer (ArcGIS 10.4.1 and earlier) and you want to upgrade to ArcGIS 10.5, choose ArcGIS Enterprise. You can download ArcGIS 10.5 from your account on My Esri The ArcGIS 10.5 setup package is designed to detect and upgrade an existing installation of the same ArcGIS product. ArcGIS 10.5 is available to customers current on maintenance.
