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MS-900 · Question #406

A company uses Microsoft 365. The company requires that you implement solutions for explicit verification. You need to recommend solutions that meet the requirements. Which three solutions should…

The correct answer is A. Multifactor authentication (MFA) C. Passwordless authentication D. Block legacy authentication. Explicit verification is a Zero Trust principle requiring that every access request be fully authenticated and authorized using all available data points, including identity strength and authentication method.

Submitted by lars.no· Mar 5, 2026Describe security, compliance, privacy, and trust in Microsoft 365

Question

A company uses Microsoft 365. The company requires that you implement solutions for explicit verification. You need to recommend solutions that meet the requirements. Which three solutions should you recommend? Each correct answer presents a complete solution. NOTE: Each correct selection is worth one point.

Options

  • AMultifactor authentication (MFA)
  • BJust-in-time (IT) access
  • CPasswordless authentication
  • DBlock legacy authentication
  • EPrivileged Access Workstations (PAW) devices

How the community answered

(40 responses)
  • A
    78% (31)
  • B
    8% (3)
  • E
    15% (6)

Why each option

Explicit verification is a Zero Trust principle requiring that every access request be fully authenticated and authorized using all available data points, including identity strength and authentication method.

AMultifactor authentication (MFA)Correct

Multifactor authentication enforces explicit verification by requiring users to prove their identity through multiple factors (something you know, have, or are), ensuring that identity claims are strongly validated before granting access.

BJust-in-time (IT) access

Just-in-time (JIT) access is a Zero Trust principle aligned with 'use least privilege access' by limiting the duration of elevated permissions, not with the 'verify explicitly' principle that focuses on authentication and identity validation.

CPasswordless authenticationCorrect

Passwordless authentication (e.g., Windows Hello, FIDO2 keys, Microsoft Authenticator) strengthens explicit verification by replacing weak password-based proofs with cryptographically backed credentials that are phishing-resistant and tied to a specific user and device.

DBlock legacy authenticationCorrect

Blocking legacy authentication enforces explicit verification by eliminating older protocols (such as SMTP AUTH, IMAP, POP3) that cannot support modern authentication challenges like MFA, which would otherwise create a bypass path around strong identity verification.

EPrivileged Access Workstations (PAW) devices

Privileged Access Workstations (PAW) are a 'assume breach' and least-privilege hardening control for securing administrative sessions via dedicated devices, not a mechanism for explicitly verifying user identity during authentication.

Concept tested: Zero Trust explicit verification via modern authentication controls

Source: https://learn.microsoft.com/en-us/azure/active-directory/conditional-access/block-legacy-authentication

Topics

#explicit verification#MFA#passwordless authentication#Zero Trust principles

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