Access a delegated mailbox in Outlook Web App (OWA)

First, be aware it might take up to 1 hour after delegation has been granted to you to be fully enabled.

Here are the steps you need to follow to see the mailbox

1. Log in to your mailbox via https://www.office.com and open Outlook.
2. Right-click your name in the folder list, and click Add shared folder. 

3. In the Add shared folder dialog box, type the name of the mailbox (info), and click Add.

4. The mailbox appears in your Outlook Web App folder list.