Open shared inbox on outlook online site:
1. From Office 365 Outlook, click on the silhouette in the top right-hand corner
2. From the Office 365 menu, select "Open another mailbox."
3. In the "Open another mailbox" dialog box, enter the name or email of the shared mailbox.
5. If no name can be found in the directory, either the incorrect name was entered, or the mailbox does not exist. Enter the name and Click “Search Directory” to confirm the name of the shared mailbox.
6. Once the correct mailbox appears in the box, click “Open” 
and the shared mailbox will open in a new tab in your browser.
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article