Microsoft sets Feb 2027 deadline to retire Entra ID SMS/voice auth

Wed, 28 Oct 2026 17:09:30 +0000

Engineer — Plan: Hard deadline of February 2027 for Entra ID SMS and voice auth retirement; begin inventorying affected users and roll out FIDO2/passkey or Authenticator app enrollment before the cutover to avoid sign-in disruptions.
SOC/IR — Learn: The eventual deprecation of SMS/voice MFA will shift the phishing and MFA-bypass attack surface — worth tracking to anticipate adjustments to credential-theft detection logic, but no immediate hunting action needed.
Leader — Plan: Microsoft is enforcing a February 2027 hard deadline on SMS/voice auth in Entra ID; allocate team capacity this quarter to scope user migration and avoid service disruptions that could escalate to a leadership incident.

Mfa-Deprecation on CuraSec