Dive into ArcGIS Enterprise 11.5 before you delve into 12
ArcGIS Enterprise 11.5 is the last version in the 11.x series, this means it will be the last version to include ArcGIS Web AppBuilder, ArcGIS Configurable Apps, and Map Viewer Classic.
Following ArcGIS Enterprise 11.5, ArcGIS Enterprise 12.0 will be released as a short-term support version for Windows and Linux. This release will no longer include those long-loved applications and will mark the beginning of the 12.x generation of the software.
ArcGIS Enterprise Life Cycle | Esri Support
Read the article below to learn more.
Dive into ArcGIS Enterprise 11.5 before you delve into 12
