Update: The full timeline for retirement of Basic Authentication in Exchange Online is now published in Basic Authentication Deprecation in Exchange Online – September 2022 Update.
It’s been a few ...
Updated Sep 01, 2022
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doshea Every administrator of an O365 Tenant has received notifications with explicit details of this change.
You are a consumer of a SaaS service so this is the accepted norm as a customer.
There is also a very good reason for this change; many attacks start with email and MFA is the strongest layer of defense to thwart it.
Microsoft has also issued details to developers on updating their software to support the the new authentication requirements. Companies like Apple have already implemented this in their Mail app years ago. It is the responsibility for the Developer of the App to keep their software updated.
And your point on the title, yes it could have been titled differently, but regardless, the Message Center notices are marked as Important, and offer a detailed explanation.