This is the same way it worked in previous versions of Web Viewer although the parameters were a little different. There are the parameters for off line reports with Content Viewer
Online only is the default and since automation is already set up from previous versions of Web Viewer, set the parameter to Recallable. You set this in the repository definition (See Additional Information below).
Manage your repositories - Configure each repository for how you want to handle offline reports
Automate the recall of offline reports configuration for recallable reports