You need to turn on Clutter in Outlook on the web so that you can use it both in Outlook on the web and Outlook.
1.Sign in to Outlook on the web. For help, see Sign in to Outlook on the web.
Note: You can't turn on Clutter in the light version of Outlook on the web. You can switch, however, to the full version by navigating to Options > General > Light version and clear the Use the light version of Outlook on the web check box.
2.In the upper-left corner of the page, choose App launcher App launcher button > Mail.
3.On the navigation bar, go to Settings Settings: update your profile, install software and connect it to the cloud > Options > Mail > Automatic processing > Clutter.
4.Choose Separate items identified as Clutter > Save
You can turn off Clutter anytime by selecting Don't separate items identified as Clutter.
The Clutter folder remains in Outlook even after you turn off the feature.