Microsoft has reminded administrators to migrate Entra ID users to phishing-resistant methods, such as passkeys, to avoid sign-in disruptions after it retires SMS first-factor sign-in starting in February 2027.

Admins also have alternatives, including QR code authentication, FIDO2 security keys, and other Entra ID-supported authentication methods.

Before this date, organizations should ensure all users use a phishing-resistant method because they will no longer be able to use SMS or voice to complete multifactor authentication and sign in to their accounts.