What is Focused Inbox?
Microsoft have introduced a Focused Inbox view in Outlook and Outlook on the web, which is on by default.
This view separates your Inbox into two tabs – Focused and Other. The intention is that the Focused tab shows your most important email and everything else is out of the way on the Other tab.
You can train Focused Inbox to help you focus on the emails which are important to you.
Some people like this splitting of the Inbox, but if you don’t, you can turn it off and go back to the standard single Inbox view.