Exchange Online and Basic Auth – September 2021 Update
We’re making some changes to improve the security of your tenant. We announced in 2019 we would be retiring Basic Authentication for legacy protocols, and in early 2021 we announced we would begin to retire Basic Authentication for protocols not being used in tenants, but not disable Basic Authentication for any in-use protocols until further notice.
Today, we are announcing that we are restarting the program to end the use of Basic Auth in Exchange Online. Beginning October 1, 2022, we will begin to disable Basic Auth in all tenants, regardless of usage.


HANDS ON tek
M365 Admin









