Outlook Web, Quick access to your Shared Mailboxes
I work with a couple of shared mailbox. They don't automatically show up in Outlook Desktop PC. No problem, our help-desk has a walk-through and it’s easy to setup.
Today I tried to see the same mailbox on Outlook Web Access (OWA). It’s not automatically there either, but I did find a couple ways to see it in the browser. Check out the Open a Shared Mailbox section of this help doc. You can either add the mailbox so it displays under your primary mailbox or open in another browser tab.
TIP
In the process I learned another way to get to a mailbox: You can bookmark any of your mailboxes with a URL. Just add the email address to the end of the URL.
Example: https://outlook.office.com/owa/YourMailBoxName@YourDomain.com/
NOTE: This will not work if you are using the OWA Beta!