Your choice could be different depending on where you are.
The Outlook on the Web (OWA) login page has two security options that allow you to indicate if you are using the software on a public or private computer. Outlook on the Web (OWA) is available for VUMC computers without access to the full Microsoft Office 365 experience, and to VUMC employees who need to login to their email when away from the main Medical Center network. Overview Sign-in to Outlook on the Web (OWA)