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Design security operations, identity, and compliance capabilities →hardMultiple ChoiceObjective-mapped

SC-100 Practice Question: Design security operations, identity, and compliance capabilities

This SC-100 practice question tests your understanding of design security operations, identity, and compliance capabilities. 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.

Exhibit

{
  "properties": {
    "displayName": "Block legacy authentication",
    "state": "enabled",
    "conditions": {
      "applications": {
        "includeApplications": ["All"]
      },
      "users": {
        "includeUsers": ["All"]
      },
      "clientAppTypes": ["exchangeActiveSync", "otherClients"]
    },
    "grantControls": {
      "builtInControls": ["block"]
    }
  }
}

Refer to the exhibit. You are reviewing a Conditional Access policy JSON. The policy is intended to block legacy authentication. However, users are still able to access email using Outlook (modern auth). What is the most likely reason?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "most likely"

    Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

Question 1hardmultiple choice
Full question →

Exhibit

{
  "properties": {
    "displayName": "Block legacy authentication",
    "state": "enabled",
    "conditions": {
      "applications": {
        "includeApplications": ["All"]
      },
      "users": {
        "includeUsers": ["All"]
      },
      "clientAppTypes": ["exchangeActiveSync", "otherClients"]
    },
    "grantControls": {
      "builtInControls": ["block"]
    }
  }
}

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The clientAppTypes list does not include 'modernAuth'

Option B is correct because the 'clientAppTypes' list in the Conditional Access policy must include 'modernAuth' to explicitly target and block modern authentication clients. Without this entry, the policy only applies to legacy authentication protocols (e.g., POP, IMAP, SMTP), leaving modern auth flows (like Outlook using OAuth 2.0) unaffected. The JSON snippet shows 'clientAppTypes': ['exchangeActiveSync', 'other'], which omits 'modernAuth', so Outlook (modern auth) bypasses the block.

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.

  • ✗

    The policy does not include 'Microsoft Office 365' in applications

    Why it's wrong here

    All apps include Office 365.

  • ✓

    The clientAppTypes list does not include 'modernAuth'

    Why this is correct

    Modern Outlook uses modernAuth client app type, which is not blocked.

    Clue confirmation

    The clue word "most likely" in the question point toward this answer.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The grant control should be 'require MFA' instead of 'block'

    Why it's wrong here

    Block is appropriate for legacy auth.

  • ✗

    The policy state is set to 'enabled' incorrectly

    Why it's wrong here

    Enabled is correct for enforcement.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates assume a 'block' policy on legacy authentication implicitly blocks modern auth, but Conditional Access requires explicit inclusion of 'modernAuth' in clientAppTypes to affect modern authentication clients.

Detailed technical explanation

How to think about this question

Conditional Access policies evaluate 'clientAppTypes' to determine which authentication flows are subject to the policy. Legacy authentication uses basic auth (e.g., POP3, IMAP4, SMTP AUTH), while modern auth uses OAuth 2.0 tokens. The 'modernAuth' client type specifically targets OAuth 2.0 flows; omitting it means the policy ignores all modern auth traffic, even if the application is included. In practice, this is a common misconfiguration when administrators assume 'block legacy auth' policies automatically cover all non-legacy clients.

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.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SC-100 question test?

Design security operations, identity, and compliance capabilities — This question tests Design security operations, identity, and compliance capabilities — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The clientAppTypes list does not include 'modernAuth' — Option B is correct because the 'clientAppTypes' list in the Conditional Access policy must include 'modernAuth' to explicitly target and block modern authentication clients. Without this entry, the policy only applies to legacy authentication protocols (e.g., POP, IMAP, SMTP), leaving modern auth flows (like Outlook using OAuth 2.0) unaffected. The JSON snippet shows 'clientAppTypes': ['exchangeActiveSync', 'other'], which omits 'modernAuth', so Outlook (modern auth) bypasses the block.

What should I do if I get this SC-100 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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This SC-100 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SC-100 exam.