2. Hover over your email address/account name in the left sidebar, then click on the "three dots" icon: 3. Click "Add Shared Folder or Mailbox" 4. Type the full email address of the shared account (e.g. contact@mycompany.com) in the box, then click Continue: 5. If the process is successful, you will receive a confirmation message. Close the message, then click the X at the top right of the Settings box to close the Settings. 6. You should now see both your own account, and the Shared Mailbox in the left sidebar: