What’s changing

Starting October 1, 2022, Microsoft is turning off Basic Authentication (BasicAuth) in all Microsoft 365 environments. Basic Authentication allows users to connect to a mailbox using only a username and a password and is not as secure as Modern Authentication. This is a global change affecting all Microsoft customers. This change will affect faculty, staff, and students that connect their email application to the Exchange email service using older, unsecured methods.

What do I have to do?

If you are using Outlook 2016 or newer on desktop, or the Outlook app on your phone or tablet, this does not affect you.  For users that are not, there are a few options depending on how you access your university Exchange email account.

Use Outlook on the Web

This is the easiest way to ensure access to your email without making any change.
Login to https://outlook.office.com to securely access your email at any time.

Use Microsoft Outlook

There are versions of the Outlook app on all common platforms which comply with the secure login requirements.

Other options

Mac devices using Mac Mail

  • If you’re using macOS 10.14 or newer, Mac Mail and Calendar will continue to work.
    • After October 1, 2022, you may need to remove the account and add it again if your service is disrupted.
  • If you’re using macOS 10.13 or older, you will need to upgrade to the latest version of macOS.

iOS/iPadOS devices using Mail

  • If your iPhone or iPad is running iOS 11 or newer, the Mail and Calendar apps will continue to work.
    • After October 1, 2022, you may need to remove the account and add it again if your service is disrupted.

Android devices

  • The native mail app on Android devices does not support Modern Authentication.
  • Install the Outlook Mobile app.

All other email clients

  • Please check with the application vendor’s web site if they have a version that supports Modern Authentication, ITS recommends and supports the Microsoft Outlook client and Outlook on the web.

Background details

https://techcommunity.microsoft.com/t5/exchange-team-blog/basic-authentication-deprecation-in-exchange-online-may-2022/ba-p/3301866