1. Open a web browser.
2. Navigate to portal.office.com
3. Log in using your Office 365 details.
4. Select Outlook.

Opening a shared mailbox in another tab.

1. Click on your profile picture in the top right-hand corner.
2. Select Open another mailbox.
3. When the Open another mailbox window appears enter the name or email address of the shared mailbox and click on Search contacts and directory.
4. When the confirmation of the shared mailbox appears, click Open.
5. The shared mailbox will now open in a new tab.

Adding a shared mailbox.

1. From the navigation panel on the left hand-side right click on your name.
   

       (If your name does not appear click folders > More)

   
   
2. Select add shared folder
3. Type in the shared mailbox name or email address.
4. Select add.
5. The shared mailbox will appear as a seperate folder on the left-hand side.