Outlook via the app launcher

Outlook can also be opened through the app launcher, which includes all of the applications in your plan.

From any area of Office 365, go to the upper-left corner and click on the app launcher. Once the app launcher  is open, you can click on Outlook to open the application:

You can also hover over Outlook on the app launcher, then click on the open menu  that appears:

 On the menu, choose Open in new tab to open Outlook in a new tab.