Legacy:

At version 3.3, the workflow of using tagged groups to create subfolders for finding content is no longer supported. (At version 3.0, it became unnecessary to tag a group with M4CC to find content in your organization and was designated as a legacy workflow with plans to remove support in a future release.) Instead, find content in your organization by searching the following data categories in the extension: My Organization (at version 3.3), My Favorites, Groups, and ArcGIS Online or ArcGIS Enterprise. Rather than create groups tagged with M4CC, use standard methods for sharing content in your organization.