1. Select Mail from the navigation pane in the new Outlook.
2. In the Folder pane, right-click your account name, and select Add shared folder or mailbox.
3. In the Add shared folder or mailbox window, type the name of the mailbox you want to access, for example, supportcenter@dom.edu.
If your admin only recently added you to a shared mailbox, it may take a few minutes before the shared mailbox appears. Wait a bit and then close and restart the new Outlook again. Or, add the shared box manually.