Update: On September 23, 2021, the Exchange Team announced that effective October 1st, 2022 basic authentication, regardless of usage will be permanently disabled in all tenants. Update: On June 17, 2021, the Exchange Team announced that they are going to turn of basic authentication for tenants not using it. Update: On February 5th, 2021, the … Continue reading Microsoft is going to disable basic/legacy authentication for Exchange Online. What does that actually mean and does that impact me?