Microsoft to enforce MFA for Microsoft 365 admin center sign-ins

Microsoft will enforce multi-factor authentication (MFA) for all Microsoft 365 admin center sign-ins starting February 9, 2026, blocking access for users without MFA across key admin portals; this follows earlier MFA enforcement across Azure services and tooling. Microsoft emphasizes MFA’s significant reduction in account compromise risk and urges admins to enable MFA via setup guidance to prevent operational disruptions.