To totally disable the “Clutter” folder in Office 365 Mail (Outlook 2013) do the following:
Open a browser (Chrome, Firefox, Internet Explorer). This can only be done from your browser and not within Outlook.
From the browser, open your email account in Office 365
Go to: MOC-FV homepage >> Resources >> Teacher >> Office 365
Login to your Office 365 account and go to your email. (Click on the waffle-looking app launcher at the top and select “Mail”.)
While in the Mail app, open preferences by pulling down the gear icon in the top right corner and selecting “Options”.
In the options menu, click the drop-down arrow beside “Mail” to get more options. Still on the left side, select “Clutter”. In the box on the right UNCHECK both boxes (“Separate items identified as clutter” and “Send me notifications about messages that are separated as clutter.”)