For years, cybersecurity experts have warned that passwords are the weakest link in the security chain. They are reused, stolen, phished, guessed, and shared. Now, Microsoft is accelerating its move towards a passwordless future, with passkeys becoming the preferred authentication method across Microsoft services and Microsoft Entra ID.

For businesses, particularly those relying on Microsoft 365, this change represents one of the most significant identity security shifts in recent years. It presents an opportunity to improve security, reduce support overhead, and deliver a better user experience.

What Is a Passkey?

A passkey is a modern authentication method that replaces traditional passwords with cryptographic credentials stored securely on a trusted device. Instead of entering a password, users authenticate using:

• Fingerprint recognition
• Facial recognition
• Device PIN
• FIDO2 security keys
• Microsoft Authenticator

Because no password is transmitted or stored in a way that can be stolen through phishing attacks, passkeys are considered substantially more secure than traditional credentials.

Why Is Microsoft Making This Change?

Cybercriminals continue to target passwords because they remain one of the easiest ways to gain unauthorised access to systems and data. Even organisations enforcing Multi-Factor Authentication (MFA) are finding that sophisticated phishing attacks can still compromise credentials. Microsoft’s strategy is to move users towards phishing-resistant authentication methods, with passkeys at the centre of that approach.

Microsoft has announced that:

• From 1 September 2026, users enabled for SMS or voice-based authentication in Microsoft Entra ID will be automatically prompted towards passkey registration.
• From 1 February 2027, Microsoft-provided SMS and voice authentication services will be retired within Entra ID.

Organisations will be expected to adopt phishing-resistant authentication methods such as Passkeys, Windows Hello for Business or FIDO2 security keys.

For many businesses, this effectively means the beginning of the end for passwords as the primary authentication mechanism.

The Benefits for Businesses

Stronger Protection Against Phishing

Traditional passwords can be entered into fake websites, stolen through malware, or exposed during data breaches. Passkeys eliminate this risk by ensuring authentication only occurs with legitimate services. There is no password for a user to accidentally disclose. This dramatically reduces the success rate of phishing campaigns.

Improved User Experience

Users no longer need to remember complex passwords or frequently reset forgotten credentials.

Instead, they can sign in using:

• Face recognition
• Fingerprint authentication
• A secure device PIN
• A trusted mobile device

The result is a faster and smoother authentication experience.

Lower IT Support Costs

Password reset requests remain one of the most common service desk tickets.

By removing dependence on passwords, organisations can reduce:

• Password reset incidents
• Account lockouts
• Credential-related support calls
• User frustration

This allows IT teams and MSPs to focus on more strategic initiatives.

Enhanced Compliance and Security Posture

Many cyber insurance providers, Cyber Essentials requirements, and security frameworks are increasing their focus on identity protection. Passkeys help organisations demonstrate stronger authentication controls and support broader Zero Trust security strategies

What Should Businesses Do Now?

The organisations that will benefit most from Microsoft’s transition are those that prepare early.

1. Review Current Authentication Methods

Assess how users currently access Microsoft 365 and business applications:

• Password only
• MFA via SMS
• Authenticator app
• Windows Hello
• Security keys

Understanding your starting position is essential before planning any migration.

2. Identify Legacy Dependencies

Some older applications may still rely on traditional password-based authentication.

These systems should be reviewed and modernised wherever possible to avoid future compatibility challenges.

3. Enable Passwordless Technologies

Consider introducing:

• Microsoft Passkeys
• Windows Hello for Business
• Microsoft Authenticator
• FIDO2 security keys

This allows users to become familiar with passwordless authentication before it becomes the default experience.

4. Educate End Users

Technology alone is not enough.

Users need to understand:

• Why the change is happening
• How passkeys work
• How to register devices
• What to do if they change or lose a device

A structured communications plan can significantly improve adoption rates.

Final Thoughts

The move to passkeys is not simply another Microsoft feature update. It represents a fundamental shift in how users prove their identity online.

Passwords have protected business systems for decades, but they are increasingly unable to keep pace with modern threats. Microsoft’s decision to make passkeys the default authentication experience signals where the industry is heading: a future where identity is simpler for users and significantly harder for attackers to compromise.

For organisations using Microsoft 365, now is the time to start planning. Those that embrace passwordless authentication early will benefit from stronger security, happier users, and fewer support headaches long before passwords finally become a thing of the past.