Starting July 30, 2020, the Office of Information Technology (OIT) will enhance the way authentication is done for on-premises Exchange users. Campus users of the desktop version of Outlook, Webmail, ActiveSync, and Outlook for Android and iOS clients will see a new multifactor authentication prompt similar to what is seen on Box, Canvas, other protected services. This change will help to protect email and other sensitive information.
By now, for many of us, this experience will be very familiar. For Exchange Server users and Skype for Business users, it will be almost exactly how it is today for Exchange Online users. The first time you log on after the change, the embedded browser will direct you to the authentication in a small popup window. Once authenticated, you will be approved to use that device until your next password change. For most users, this means you would only be required to authenticate once per year.