Issue:
How To Add a Shared Mailbox in Outlook
Resolution:
1. In Outlook, click on File on the top left.
2. Click on Account Settings, and Account Settings again from the drop-down menu.
3. In Account Settings, in the Email tab, click Change.
4. In the Change Account settings, click on the More Settings on the bottom right-hand side.
5. Click OK to continue. This is letting you know that you must exit Outlook before the changes will take place.
6. In the Microsoft Exchange settings, click on the Advanced tab.
6. Click Add, and in the Add Mailbox box, type in the mailbox you wish to add. Click OK.
7. Click Next to continue.
8. Click Finish. You are all set!
9. Close Outlook and re-open to refresh your settings.
10. Your newly added mailbox will appear on the left-hand side.