What is the Clutter Feature?
Clutter is an Office 365 email filtering feature designed to move low priority messages out of your Inbox and into their own folder titled "Clutter". Clutter utilizes actions you have taken in the past to determine the messages you’re most likely to ignore. It then moves those messages to the Clutter folder .
Clutter and junk email are both filtered out before they reach your Inbox. Junk email is evaluated and filtered first. Next, Clutter analyzes the remaining messages destined for your Inbox, and filters out the types of messages that you usually ignore or don't respond to, based on your past behavior. Once Clutter is enabled in the Outlook Web Application, it appears in other clients linked to that Exchange account, including Outlook on both Windows and OS X platforms.
How do I Turn Clutter On or Off?
1. Log into the Office 365 Outlook Web App
NOTE: You can not change this setting within Outlook. However, If you have Outlook 2016 for Windows, you can right-click the Clutter folder and choose Manage Clutter and you should be taken to the web portal.
2. Click on the Gear icon in the top right corner of the page
3. Choose: Options
4. In the Mail section on left, expand Automatic processing and click on: Clutter.
5. Select whether you want to turn Clutter on or off:
6. Press the Save button in the top left corner.
7. Press the Back button in front of Options in the top left corner to return to your Inbox.
NOTE: The Clutter folder remains in Outlook even after you turn off the Clutter feature.