Microsoft Entra ID has introduced a significant security update: passkeys are now the default authentication method. This move aims to strengthen identity security, reduce phishing attempts and streamline access for all organisations relying on Microsoft Entra ID (formerly Azure Active Directory).
Passkeys Become the Default in Microsoft Entra ID
On 13 July 2026, Microsoft announced that passkeys have officially replaced passwords and legacy multi-factor authentication (MFA) as the default sign-in method for Entra ID. This update impacts all organisations using Microsoft Entra ID, marking a pivotal shift in how users access cloud and enterprise resources within the Microsoft ecosystem.
Passkeys are cryptographically generated credentials that are bound to a user device, providing phishing-resistant authentication. By aligning with FIDO2 standards, Microsoft aims to eliminate traditional password-based attacks, such as phishing and credential stuffing, across the Entra ID platform.
Event Timeline and Rollout Details
The transition to passkeys as the default method was formally announced by Microsoft on 13 July 2026. According to the official Microsoft Security Blog, the rollout is immediate for all new authentication policy configurations. Existing Entra ID tenants are being encouraged to review and update their authentication settings to adopt passkeys, but the default for new users and policies is now set to passkey-based sign-in.
- Announcement date: 13 July 2026
- Platform: Microsoft Entra ID (formerly Azure Active Directory)
- Affected users: All current and future Entra ID organisations and users
- Authentication change: Passkeys are now the default, replacing passwords and legacy MFA
- Standards: FIDO2-compliant passkeys, compatible with Windows Hello, security keys and mobile device biometrics
How Passkeys Work in Entra ID
Microsoft Entra ID’s passkey implementation uses public key cryptography. When a user registers a device, a unique cryptographic key pair is created. The private key remains securely on the device, while the public key is stored in Entra ID. Authentication is performed by proving possession of the private key, typically using biometric or PIN-based device unlock.
This architecture means that user credentials are never transmitted or stored centrally, making them highly resistant to phishing and interception. Passkeys can be bound to specific devices, including Windows PCs, iOS and Android smartphones, and FIDO2 hardware security keys. Microsoft’s approach is designed to work seamlessly across browsers and platforms that support the FIDO2 protocol.
Key Features of Passkey Authentication
- Phishing resistance: Passkeys cannot be easily intercepted or reused by attackers
- User convenience: No need to remember complex passwords or manage traditional OTP tokens
- Device-based authentication: Sign-in is tied to possession of a registered device with built-in biometric or PIN unlock
- Standardised security: Built on FIDO2, ensuring compatibility with a wide range of devices and services
Current Status and Exploitation Risk
With passkeys as the default, new Entra ID configurations are immediately more resistant to credential theft and phishing. Microsoft reports that the passkey technology has been extensively tested across its cloud infrastructure and is ready for broad enterprise adoption. The company has not reported any critical vulnerabilities in its FIDO2-based implementation to date.
However, the transition does require organisations to review device compatibility and ensure users are equipped with FIDO2-capable devices or up-to-date browsers. While legacy authentication methods remain available for backwards compatibility, Microsoft strongly recommends phasing them out to minimise exposure to known attack vectors.
Security researchers widely agree that passkey adoption closes many of the most common credential attack paths. As of July 2026, there are no known large-scale attacks against Entra ID’s passkey implementation, and Microsoft is actively monitoring for attempted bypasses or weaknesses.
Why This Matters for Organisations
This shift to passkeys in Microsoft Entra ID is a major milestone for enterprise security. Phishing and password attacks remain the most common causes of breaches. By making passkeys the default, Microsoft is forcing a move towards stronger, simpler authentication for millions of users and thousands of organisations globally.
Adopting passkeys can help organisations:
- Reduce the risk of credential-based attacks
- Simplify user sign-in and reduce password reset costs
- Meet regulatory and cyber insurance requirements for strong authentication
What Organisations Should Do Next
Organisations using Microsoft Entra ID should:
- Review and update authentication policies to prioritise passkey sign-in
- Audit user devices to confirm compatibility with FIDO2 and passkey standards
- Educate users about the new sign-in experience and device requirements
- Phase out passwords and legacy MFA where possible to reduce risk
Staying current with Microsoft’s security guidance and monitoring for any emerging passkey-related vulnerabilities is essential as adoption continues to grow.
Originally reported by microsoft.com.
