Microsoft has recently begun to urge users to stop using mobile-based multi-factor authentication (MFA), such as one-time SMS codes or voice calls, and instead are encouraging users to use newer MFA solutions such as security keys or app-based authentication.
Alex Weinert, Directory of Identity Security at Microsoft has issued these warnings, with Weinert being Microsofts main advocate over the past year for encouraging users to enable MFA for their Microsoft accounts.
