Office 365, Web App, How to connect shared mailbox to Outlook WEB App

From my point of view, this is one of the best functions, what you get from Office 365. After connection, shared mailbox will be available on the phone and other mobile devices. Very similar to Outlook desktop application. Outlook WEB App is brilliant.

Note: To open shared mailbox, you should have permissions to it. It is usually done by IT staff.

Have a good time!
Br, Alex