Microsoft has started to roll out a feature called Clutter in Office 365. Clutter is advertised to help users focus on the most important messages in the inbox by “moving lower priority messages out of your way into a Clutter folder.” Clutter is being turned on automatically, as it progresses through the different Microsoft tenants.
Since Clutter places items into their own folder, there is the potential that legitimate email could be moved incorrectly. Users have the ability to move messages and conversations back into the inbox, and vice versa.
University IT is reviewing how Office 365 administrators can ensure that critical messages make it into the Inbox, globally disable this feature until communicated properly, provide a way to personalize Clutter notifications, and/or set retention policies for Clutter folders.