OIT will be enabling Modern Authentication for Office 365. This will improve the security of account access for email clients supporting Modern Authentication by making use of Shibboleth and multifactor authentication (MFA). Users may be prompted to re-authenticate one time from their Outlook and Apple Mail clients, as well as mobile clients (e.g. iOS Mail and Outlook for iOS or Android). The change will not impact those using Outlook Web Access.
If you have any questions about the maintenance or if you experience an unexpected service impact please contact the OIT Service Desk: https://oit.duke.edu/help
For more information about Office 365 visit OIT's web page: https://oit.duke.edu/what-we-do/applications/office-365