Basic Authentication access to Office 365 email services will be disabled on February 22, 2022 for the ActiveSync, POP, and IMAP protocols. This is part of the larger effort to better improve security with our email services.

These changes do not impact most UI email users. Those affected by this change have received communication over the last three months along with resources to convert to Modern Authentication. Support resources are available on the Office 365: Email and Calendaring page.