Note: If you are not running Microsoft Office 365, please contact your desktop support person and upgrade to the latest version of Microsoft Office.
1. In Outlook 365, click Mail in the bottom-left corner of the window.
2. Right-click your email account name in the folders pane on the left side of the window and select Data File Properties from the menu.
3. Click the Advanced button in the Properties window.
4. Click the Advanced tab.
5. Click the Add button to specify a shared mailbox.
6. Type the name of the shared mailbox in the Add Mailbox window and click OK.
7. The account now appears in the list of additional mailboxes. Click Apply.
8. Click OK.
The shared mailbox now appears in your list of email folders under its own heading allowing you to view, send, and manage emails for this shared account. If it does not appear right away, restart Outlook. This refreshes the connection to the server.
9. You have successfully added the shared mailbox.