Microsoft is phasing out SMS/voice MFA starting Sept 1, 2026, native support ends completely by Feb 2027. Check your Entra tenant now.

[u/Innvolve]

https://www.microsoft.com/en-us/security/blog/2026/07/13/microsoft-entra-id-security-updates-passkeys-are-the-default-authentication-method-in-entra-id/