The answer is to create a Conditional Access policy that requires MFA for all users. This approach is correct because Conditional Access policies evaluate sign-in risks and enforce MFA at the point of authentication, but they do not force users to re-register security information if it already exists in their account. The policy simply triggers the MFA challenge during login, respecting any previously saved registration methods like the Microsoft Authenticator app or phone number. On the MS-102 exam, this question tests your understanding of how Conditional Access differs from legacy per-user MFA enforcement, which would force registration even for users who already have security info. A common trap is choosing a security default or per-user MFA setting, both of which require all users to register from scratch. Remember the key distinction: Conditional Access enforces the *action* of MFA, not the *setup* of it. Memory tip: "Conditional Access checks the lock, it doesn’t hand out new keys."
MS-102 Practice Question: Implement and manage Microsoft Entra identity and access
This MS-102 practice question tests your understanding of implement and manage microsoft entra identity and access. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You need to enforce multifactor authentication (MFA) for all users in a Microsoft Entra ID tenant. The solution must not require users to register security info if they already have it. Which approach should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a Conditional Access policy that requires MFA for all users
Option C is correct because a Conditional Access policy can require MFA for all users while respecting existing security info registration. The policy triggers MFA during sign-in but does not force re-registration if the user has already registered. This meets the requirement of not requiring users to register security info if they already have it.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use identity protection to enforce MFA for risky sign-ins
Why it's wrong here
This only applies to risky sign-ins, not all users.
✗
Assign MFA per user in the Microsoft Entra admin center
Why it's wrong here
Per-user MFA requires users to register if not already.
✓
Create a Conditional Access policy that requires MFA for all users
Why this is correct
Conditional Access can require MFA; existing registered users can use their methods.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable security defaults
Why it's wrong here
Security defaults enforce MFA but also require registration if not done.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse security defaults (which enforce MFA but force registration) with Conditional Access (which can enforce MFA without forcing re-registration), leading them to choose D instead of C.
Detailed technical explanation
How to think about this question
Conditional Access policies evaluate sign-in context and apply MFA as a grant control, leveraging the user's existing authentication methods (e.g., phone, authenticator app) stored in the tenant. The policy does not trigger a registration prompt unless the user has no registered methods; instead, it blocks sign-in or falls back to admin-defined behavior. In real-world scenarios, this allows organizations to gradually enforce MFA without disrupting users who already completed registration via other means (e.g., self-service password reset).
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-102 question in full detail.
Implement and manage Microsoft Entra identity and access — This question tests Implement and manage Microsoft Entra identity and access — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a Conditional Access policy that requires MFA for all users — Option C is correct because a Conditional Access policy can require MFA for all users while respecting existing security info registration. The policy triggers MFA during sign-in but does not force re-registration if the user has already registered. This meets the requirement of not requiring users to register security info if they already have it.
What should I do if I get this MS-102 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Your organization uses Microsoft 365 Business Premium with Microsoft Entra ID P1. You have 200 users. You need to enforce multi-factor authentication (MFA) for all users accessing the company's CRM application, which is a third-party SaaS app integrated via SAML. The CRM app does not support modern authentication protocols. You want to use a Microsoft solution that does not require additional licenses. What should you use?
easy
A.Enable security defaults in Microsoft Entra ID.
B.Deploy Microsoft Entra application proxy for the CRM app.
C.Configure per-user MFA for users of the CRM app.
✓ D.Create a Conditional Access policy targeting the CRM application and require MFA.
Why D: Option B (Conditional Access) can enforce MFA for SAML apps even if they don't support modern auth, because the authentication happens via Entra ID. Security defaults (Option A) would apply MFA to all apps but cannot be customized. Option C (app proxy) is for on-premises apps. Option D (third-party MFA) is not a Microsoft solution and may require additional cost.
Last reviewed: Jun 24, 2026
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