Available with Workflow Manager license.
Obtaining a license
ArcGIS Workflow Manager for Desktop uses your current ArcGIS license system and requires authorization to be activated. You will need to update your license manager to add the Workflow Manager feature. Once your license manager has been updated, you will be able to use the Workflow Manager applications and activate the installed Workflow Manager extension through the standard ArcGIS Extensions dialog box.
Upgrade your license files
Refer to the ArcGIS for Desktop help for more information on authorizing ArcGIS for Desktop extensions.
Uninstalling previous Workflow Manager products
If any ArcGIS products are installed on your machine and are earlier releases to 10.3.1, they need to be updated to 10.3.1 before proceeding with the ArcGIS Workflow Manager for Desktop setup. The ArcGIS 10.3.1 Workflow Manager setup package is designed to detect and upgrade an existing installation of ArcGIS 10.3,10.2.x, and 10.1 Workflow Manager for Desktop (including SP1).
The Workflow Manager setup will terminate and display a dialog box if conflicting releases of these products exist on your machine. If so, you must uninstall each of them and run the ArcGIS for Desktop setup again to proceed with your installation.
As long as all the installed products are for the 10.3.1 release, they can coexist on your computer without conflict.