Microsoft is retiring SMS for MFA: in February 2027 Entra ID stops sending them. The strange part is that it lasted this long
On July 13 Microsoft announced that Entra ID will stop providing SMS and voice calls as an authentication method: passkeys by default from September 1 and full retirement on February 1, 2027, with no opt-out. Anyone insisting on SMS will have to contract and pay their own telecom provider. The full timeline, why SMS was never a serious second factor, and the plan we would apply to any tenant.