The Focused Inbox is an email sorting feature created for Office 365, similar to Junk Mail. The Focused Inbox moves your low priority messages out of your Inbox so you can easily scan for important messages. It analyzes your email habits, and based on your past behavior, it determines the messages that you’re most likely to ignore. After determination, it moves the messages into its own folder so that you may review them at a later date.
Focused Inbox determines your habits and preferences, as well as assigning priority to messages based on your behavior. It then moves those messages to the 'Other' folder so that you may keep high priority messages front and center in your 'Focused Inbox'. Since the Focused Inbox does sort messages based on your behavior, it can be trained to keep important messages in the Inbox. In order to 'train' Clutter you can drag important messages to the Inbox. The tool will get smarter over time, learning from your behavior and the dragging of important messages back to the Inbox.
The Focused Inbox can be disabled, but not removed from your settings altogether. To disable the Focused Inbox, please log into the following link which takes you directly to the Focused Inbox settings: https://outlook.office.com/owa/?realm=uccs.edu&path=/options/focusedinbox
After logging in, click the Settings gear in the top-right corner and toggle the Focused Inbox switch: