• 1.      Click on your name in the upper-right corner of the window and click Open another mailbox.
    https://kb.intermedia.net/graphics/articles/34413_1.png
  • 2.      In the Open another mailbox box, enter the email address of the mailbox that you want to open and click Open. The mailbox will open in a new window.
    https://kb.intermedia.net/graphics/articles/34413_2.png

To add a shared mailbox to the left navigation pane:

  • 1.      Sign in to your account in OWA.
  • 2.      Right-click your primary mailbox in the left navigation pane, and then choose Add shared folder.
    https://kb.intermedia.net/Contents/34413/34413_3.png
  • 3.      In the Add shared folder dialog box, type the name or email address of the mailbox you have full access to, and select Add.
    https://kb.intermedia.net/Contents/34413/34413_4.png

The shared mailbox and its folders will be displayed in the left navigation pane each time you open