Last month we turned off Basic auth in Exchange Online for many customers. We’ve protected millions of users from the risks associated with using this legacy form of authentication to access their da...
Updated Nov 16, 2022
Version 1.0
Blog Post
Greg Taylor - EXCHANGE
Microsoft
MicrosoftCodepoet80 - I'm sorry you feel like that, we do care, or we wouldn't be trying to help protect your tenant, but I do understand how it might feel. All the best.
Jo_Bowles - Sorry to hear you got compromised, glad we could help you out though.
JonasBack - SMTP is already under attack. Constantly. Given we can't turn it off yet because of all those hardware devices out there my advice is simply this: Disable SMTP Client Auth Submission at the tenant level, and re-enable on a per-user basis. If you can block Basic for SMTP too, great, but that's often not possible. https://learn.microsoft.com/exchange/clients-and-mobile-in-exchange-online/authenticated-client-smtp-submission