1. Log in to your mailbox using Outlook Web App (https://outlook.office.com).
  2. At the left, right-click Folders in the folder list, and select Add shared folder or mailbox
  3. In the Add shared folder or mailbox dialog box, type the email address or name of the mailbox, select it from the list and click Add.
  4. The mailbox will be shown in your Outlook folder list, you may need to scroll down to see it.

Note: If you have only been provided access to specific folders in the other user’s mailbox, you will only see the folders for which you have been granted access.


If you no longer need the additional mailbox to display in your Outlook Web App, right-click the folder, and select Remove shared folder.