Outlook Mail And Calendar Icons On Left Side. The new location lets you find and use apps in addition to outlook's core modules. Do you want to bring it back to the app’s bottom bar?
The first way, we can use the outlook settings to move the navigation panel back to bottom. In outlook 2016, there is this huge gray bar at the bottom which lists (in a very big font) mail, calendar, people, tasks, etc… to switch to their corresponding folder.