External Apps: Enabling Ed Discussion in Your Canvas Course
Ed Discussions is not enabled by default in your Canvas courses, but can be easily added.
In your Canvas course, go to  Settings in the course navigation menu, and select the tab at the top of the page labeled  Navigation.
Find Ed Discussion in the list of Disabled items and drag it up into the active course navigation list. When done, click Save at the bottom of the page.
Ed Discussion will now appear in your course navigation menu.
Click on Ed Discussion in the navigation menu to begin Setting Up Ed Discussion for Your Course.