- A
Microsoft Entra Password Protection
Why wrong: Password Protection blocks weak passwords, not legacy protocols.
- B
Microsoft Entra ID Protection
Why wrong: Identity Protection detects risky sign-ins but cannot block legacy auth protocols directly.
- C
Microsoft Entra Connect Health
Why wrong: Connect Health monitors sync health, not authentication protocols.
- D
Conditional Access policy
Conditional Access can block legacy authentication by targeting client apps.
Question 136 of 1,411
SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
This SC-900 practice question tests your understanding of describe the capabilities of microsoft security solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Contoso has a hybrid identity with AD DS synced to Microsoft Entra ID. They want to block legacy authentication protocols that bypass MFA. Which security solution should they use?
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
✓
Conditional Access policy
Conditional Access policies in Microsoft Entra ID can be configured to block legacy authentication protocols (such as POP3, IMAP, SMTP, and basic authentication) by targeting client apps that do not support modern authentication. This directly prevents bypass of MFA because legacy protocols do not support MFA challenges, making them a common attack vector. By creating a policy that blocks all access from legacy authentication clients, Contoso enforces MFA for all sign-ins that use modern authentication.
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.
- ✗
Microsoft Entra Password Protection
Why it's wrong here
Password Protection blocks weak passwords, not legacy protocols.
- ✗
Microsoft Entra ID Protection
Why it's wrong here
Identity Protection detects risky sign-ins but cannot block legacy auth protocols directly.
- ✗
Microsoft Entra Connect Health
Why it's wrong here
Connect Health monitors sync health, not authentication protocols.
- ✓
Conditional Access policy
Why this is correct
Conditional Access can block legacy authentication by targeting client apps.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Entra ID Protection (which detects risky sign-ins) with the actual enforcement mechanism (Conditional Access) that can block legacy authentication, or they mistakenly think Password Protection or Connect Health can control authentication protocols.
Detailed technical explanation
How to think about this question
Legacy authentication protocols such as POP3, IMAP4, SMTP, and older versions of Exchange ActiveSync use basic authentication, which sends credentials in plaintext and cannot support MFA. Conditional Access policies evaluate the 'Client Apps' condition, where administrators can select 'Exchange ActiveSync clients' and 'Other clients' to block legacy protocols. In a hybrid environment, this policy applies to cloud-authenticated users; for on-premises resources, you would additionally need to configure the on-premises AD FS or use the 'Block Legacy Authentication' setting in the Azure AD Security Defaults or via a Conditional Access policy targeting all cloud apps.
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this SC-900 question test?
Describe the capabilities of Microsoft security solutions — This question tests Describe the capabilities of Microsoft security solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Conditional Access policy — Conditional Access policies in Microsoft Entra ID can be configured to block legacy authentication protocols (such as POP3, IMAP, SMTP, and basic authentication) by targeting client apps that do not support modern authentication. This directly prevents bypass of MFA because legacy protocols do not support MFA challenges, making them a common attack vector. By creating a policy that blocks all access from legacy authentication clients, Contoso enforces MFA for all sign-ins that use modern authentication.
What should I do if I get this SC-900 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.
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Last reviewed: Jul 4, 2026
This SC-900 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-900 exam.
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