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. 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.
An organization wants to protect against spear-phishing attacks where attackers impersonate the company's CEO or other trusted domains to trick employees into transferring funds. They need a security solution that uses machine learning to detect and prevent such impersonation attempts in incoming emails. Which Microsoft 365 protection feature should they enable?
Why wrong: Incorrect. Anti-spam policies filter out junk mail but do not specifically detect impersonation of trusted individuals or domains.
B
Anti-phishing policy (impersonation protection)
Correct. Anti-phishing policies in Defender for Office 365 include impersonation protection, which uses AI to detect and block phishing that impersonates users or domains.
C
Safe Links
Why wrong: Incorrect. Safe Links protects users from malicious URLs in email by checking links at time of click, but it does not detect impersonation in the email header or body.
D
Safe Attachments
Why wrong: Incorrect. Safe Attachments scans email attachments for malware, but does not address impersonation-based phishing.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Anti-phishing policy (impersonation protection)
Anti-phishing policy with impersonation protection uses machine learning models to detect and block attempts to impersonate specific users (like the CEO) or trusted domains in incoming emails. This directly addresses the scenario of spear-phishing attacks that trick employees into transferring funds by mimicking trusted senders.
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.
✗
Anti-spam policy
Why it's wrong here
Incorrect. Anti-spam policies filter out junk mail but do not specifically detect impersonation of trusted individuals or domains.
✓
Anti-phishing policy (impersonation protection)
Why this is correct
Correct. Anti-phishing policies in Defender for Office 365 include impersonation protection, which uses AI to detect and block phishing that impersonates users or domains.
Related concept
Read the scenario before looking for a memorised answer.
✗
Safe Links
Why it's wrong here
Incorrect. Safe Links protects users from malicious URLs in email by checking links at time of click, but it does not detect impersonation in the email header or body.
✗
Safe Attachments
Why it's wrong here
Incorrect. Safe Attachments scans email attachments for malware, but does not address impersonation-based phishing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Microsoft often tests the distinction between anti-phishing policies (which include impersonation protection) and anti-spam policies, leading candidates to mistakenly choose anti-spam when the question explicitly mentions targeted impersonation rather than generic spam.
Detailed technical explanation
How to think about this question
Impersonation protection in Microsoft Defender for Office 365 uses a combination of user-defined lists (e.g., CEO's email address) and machine learning models that analyze sender behavior, writing style, and domain similarity (e.g., ceo@contoso.com vs. ceo@contoso-legal.com). The policy can also apply to internal domains (e.g., contoso.com) to prevent intra-org impersonation, which is a common vector for CEO fraud. Under the hood, it leverages the Exchange Online Protection (EOP) and Defender for Office 365 filtering stack, evaluating messages at the transport layer before delivery.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-900 question in full detail.
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: Anti-phishing policy (impersonation protection) — Anti-phishing policy with impersonation protection uses machine learning models to detect and block attempts to impersonate specific users (like the CEO) or trusted domains in incoming emails. This directly addresses the scenario of spear-phishing attacks that trick employees into transferring funds by mimicking trusted senders.
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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Question Discussion
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