Quick Answer
The answer is impersonation protection for users. This policy setting is the correct choice because it specifically defends against spear-phishing attacks that impersonate high-value targets like executives, scanning both the display name and email address to detect fraudulent messages. On the Microsoft Security, Compliance, and Identity Fundamentals SC-900 exam, this concept tests your understanding of how Microsoft Defender for Office 365 anti-phishing policies differentiate between broad spoofing and targeted user impersonation—a common trap is confusing spoof intelligence (which handles domain spoofing) with impersonation protection. To remember, think of the mnemonic "U-I for VIPs": User Impersonation protects Very Important People from targeted attacks, while spoofing is about fake domains, not fake people.
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.
Your company has Microsoft Defender for Office 365 and wants to configure anti-phishing policies to protect against spear-phishing attacks targeting executives. Which policy setting should you enable to provide the highest level of protection?
Malware filter
Why wrong: Malware filter handles malicious attachments, not phishing.
Impersonation protection for users
Impersonation protection detects and blocks attempts to impersonate specific users.
Bulk email filtering
Why wrong: Bulk email filtering addresses spam, not targeted phishing.
Spoof intelligence
Why wrong: Spoof intelligence detects spoofed domains but not user impersonation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Impersonation protection for users
Option C is correct because impersonation protection specifically protects against spear-phishing attacks targeting specific users like executives. Option A is wrong because spoof intelligence detects spoofed domains but not user impersonation. Option B is wrong because bulk email filtering reduces bulk mail but not targeted phishing. Option D is wrong because malware filter handles attachments with malware, not phishing.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Malware filter
Why it's wrong here
Malware filter handles malicious attachments, not phishing.
Impersonation protection for users
Why this is correct
Impersonation protection detects and blocks attempts to impersonate specific users.
Related concept
Static NAT maps one inside address to one outside address.
Bulk email filtering
Why it's wrong here
Bulk email filtering addresses spam, not targeted phishing.
Spoof intelligence
Why it's wrong here
Spoof intelligence detects spoofed domains but not user impersonation.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-900 NAT questions on configuration and troubleshooting.
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FAQ
Describe the capabilities of Microsoft security solutions — This question tests Describe the capabilities of Microsoft security solutions — Static NAT maps one inside address to one outside address..
The correct answer is: Impersonation protection for users — Option C is correct because impersonation protection specifically protects against spear-phishing attacks targeting specific users like executives. Option A is wrong because spoof intelligence detects spoofed domains but not user impersonation. Option B is wrong because bulk email filtering reduces bulk mail but not targeted phishing. Option D is wrong because malware filter handles attachments with malware, not phishing.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-900 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
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