Select “Don’t Sort Messages” to turn off focused inbox. You’ll be informed about email flowing to Other, and you can switch between tabs any time to take a quick look. The Focused and Other tabs will appear at the top of your mailbox.
Then chose Display settings > Focused Inbox.
It is not configured in the PC based Outlook client on campus. IMPORTANT NOTE: Microsoft Outlook’s Focused Inbox is available in the Outlook 365 (webmail) interface, the iOS mobile interface and the Mac Outlook interface. Your most important emails are on the Focused tab while the rest remain easily accessible-but out of the way-on the Other tab. Focused Inbox separates your inbox into two tabs-Focused and Other.