How to turn off the Clutter folder in Outlook
In my work outlook email a new service poped up a few months ago. It is called Clutter and it classifies some messages as low priority and then moves them from my inbox to the clutter folder, automatically. Just by using your email, it learns which messages aren’t important to you and then automatically moves them to the clutter folder. If Clutter gets it wrong you just move the message from the Clutter folder back to your inbox and it won’t make that mistake next time. Clutter will send summary emails every morning on what it has sorted for you.
This is great right? Well, what if you don’t want this service? You can just turn it off. But, the trick is you have to find out how to turn it off first. I have looked all over my outlook client to find how to turn it off. Can you find it? Probably not or you wouln’t be reading this post. (Hint, it’s not in the Outlook client app) Below are the instructions on how to turn it off.
How to Turn Clutter OFF
Sign in to Outlook Web App. https://outlook.office365.com/
Then click on the settings “sprocket” 
as in the photo below and then select Mail.
Now fromclick down into Options – Mail > Automatic processing > Clutter.
Uncheck the Check Box “Separate items identified as Clutter”.
Click 
Save to save your changes, or 
Discard to cancel.
Turn Clutter back on
You can turn Clutter back on by just reversing the steps above.
The Clutter folder will remain in your Outlook after you turn off Clutter feature. If you don’t want the folder listed under your Mailbox, move the emails from the Clutter folder to other folders, as appropriate, and then right-click the Clutter folder and choose Delete Folder.