Microsoft Entra SMS and voice authentication will be retired on February 1, 2027, as Microsoft begins moving customers toward passkeys and other phishing-resistant sign-in methods. Entra ID will automatically enable passkey support for users who currently depend on SMS or voice authentication. Microsoft says SMS authentication carries security risksMicrosoft says attackers can increasingly compromise SMS authentication through methods including SIM-swapping and Adversary-in-the-Middle phishing. Microsoft will allow them to use customer-managed telecom providers available through the Microsoft Security Store. Microsoft is also phasing out SMS authentication for personal Microsoft accounts.