Enable/Disable Focused Inbox in Outlook
Focused Inbox separates your inbox into two tabs—Focused and Other. Your most important email messages are on the Focused tab while the rest remain easily accessible—but out of the way—on the Other tab.
Outlook 2016 (windows)
Select the View tab.
Select Show Focused Inbox.
The Focused and Other tabs will disappear from the top of your mailbox.
Outlook on the web
Note: If the instructions don't match what you see, you might be using an older version of Outlook on the web. Try the Instructions for classic Outlook on the web.
At the top of the page, select Settings .
In the Settings pane, move the Focused Inbox toggle to off.
Outlook 2016 for Mac
On the Organize tab, select Focused inbox.
The Focused and Other tabs will disappear from the top of your mailbox.
Outlook Mobile
Click the menu button at the top of your screen.
Choose .
Use the Focused Inbox slider to turn Focused Inbox off.