Outlook Web App - Opening an Additional Mailbox
This article is intended to illustrate how to switch to a shared email account within the Outlook Online Application as part of Office 365.
Switching Accounts
After signing into Outlook Online, click on you user icon as displayed below
A menu will have opened, named My Accounts. Select "Open another mailbox. . . " as shown below
Type the email address that you intend to access and click open.