Microsoft 365 Passwordless Authentication Across Platforms

Answer Correct answer: A — Use the Microsoft Authenticator app for passwordless authentication on Windows, Android, and iOS.

You have a Microsoft 365 subscription. You need to implement a passwordless authentication solution that supports the following device types: • Windows • Android • iOS The solution must use the same authentication method for all devices. Which authentication method should you use?

the Microsoft Authentication app Correct Answer
Voice call
multi-factor authentication (MFA)
Windows Hello for Business

ms-102 passwordless authentication microsoft authenticator app cross platform windows hello for business limitations

Community Votes

100%

100% of anonymous learners picked answer A. Votes are pick records left by other test-takers — they are not the verified answer.

Community Insight

Tests knowledge of cross-platform passwordless solutions versus platform-specific ones like Windows Hello for Business.

Identifies the Microsoft Authenticator app as the correct passwordless method for Windows, Android, and iOS. Explains why other options fail to meet cross-platform or passwordless criteria.

Selecting Windows Hello for Business (D), which is limited to Windows devices and does not support Android/iOS.

Community Discussion (7 comments)

[Removed] 👍 9 Selected: A

The Microsoft Authenticator App

Frank9020 👍 1 Selected: A

It is really an impossible question to answer, alternative A: is dependent on mobile device as mobile phone or tablet alternative B: depends on phone to be able to get a phone call alternative C: MFA can be passwordless, but only in use with another method ex. Hello, MS authenticator or FIDO. alterternative D: Hello for Business, is not available for Android or iOS devices.

Tomtom11 👍 1

Passwordless authentication allows you to replace authentication using a password with authentication requiring “something you have” and “something you know.” An example might be a biometric, such as your face or fingerprint, combined with a code generated by an authenticator device.

APK1 👍 1 Selected: B

Correct Answer is B

Gim99 👍 3

To implement a passwordless authentication solution that supports Windows, Android, and iOS devices and uses the same authentication method for all devices, the best option is: A. the Microsoft Authentication app

belyo 👍 2 Selected: A

Microsoft authentication app for sure

Murad01 👍 3

Wrong answer. A is the correct answer (Microsoft authentication app)

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Expert Analysis

Why the Answer Is Correct

The Microsoft Authenticator app (Option A) is the only solution listed that supports passwordless authentication across Windows, Android, and iOS platforms. It enables features like push notifications, one-time passcodes, and number matching, allowing users to sign in without a traditional password on any supported device.

Why the Other Options Are Wrong

Voice call (Option B) requires a phone line and is generally considered a secondary factor rather than a primary passwordless method for all devices, and it doesn't work well with tablets or desktops lacking voice capability. Multi-factor authentication (Option C) is a framework, not a specific method, and often includes passwords unless specifically configured as 'passwordless MFA', but the question asks for a single method. Windows Hello for Business (Option D) is strictly for Windows devices and cannot be used on Android or iOS.

Community Comment Notes

Many learners initially struggled with this question, with some arguing for Voice Call or MFA. As Frank9020 noted, "alternative D: Hello for Business, is not available for Android or iOS devices," highlighting the key constraint. The consensus correctly identifies that only the Authenticator app works universally across the required platforms.

Exam Strategy

Focus on the specific capabilities and limitations of each authentication method. Remember that 'Windows Hello' implies Windows-only, while 'Authenticator App' is cross-platform. Always check if the solution meets ALL device requirements listed in the scenario.

Frequently Asked Questions

Why is Windows Hello for Business incorrect?

Windows Hello for Business is only supported on Windows devices and cannot authenticate Android or iOS users.

Is MFA considered passwordless?

Standard MFA often uses passwords plus another factor. Passwordless MFA typically refers to methods like FIDO2 or the Authenticator app push.

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