Basic Authentication and Exchange Online – September 2021 Update
Last week Microsoft announced that, effective October 1, 2022, they will beginto permanently disable Basic Auth in all tenants, regardless of usage (with the exception of SMTP Auth). Why the sudden change from their February 2021 announcement about postponing disabling Basic Auth for protocols in active use by tenant until further notice, yet Microsoft would continue to disable Basic Auth for all protocols not being used? We have the answers and the FAQs for you.