The answer is an anomaly detection policy. This is the correct choice because Defender for Cloud Apps uses machine learning to establish a baseline of normal user behavior, and an anomaly detection policy for mass file downloads triggers alerts when activity deviates from that baseline—such as downloading more than 10 files from SharePoint Online within five minutes—without requiring you to hard-code a specific threshold. On the SC-900 exam, this question tests your understanding of how Microsoft’s security solutions differentiate between rule-based activity policies and adaptive anomaly detection; a common trap is confusing anomaly detection with activity policies, but remember that anomaly policies learn from historical patterns rather than relying on fixed rules. For a quick memory tip, think “anomaly = abnormal patterns, activity = fixed rules.”
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.
A company uses Microsoft Defender for Cloud Apps to monitor SaaS app usage. The security team wants to receive an alert when a user downloads more than 10 files from SharePoint Online within 5 minutes. Which type of policy should they create?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Anomaly detection policy
Anomaly detection policies use machine learning to detect unusual user behavior based on historical baselines, such as mass file downloads. Activity policies are rule-based but require explicit thresholds; however, the scenario describes behavior that is best detected by an anomaly detection policy because it adapts to typical usage patterns. Option A is wrong because session policies control real-time access. Option C is wrong because OAuth app policies govern app permissions. Option D is wrong because file policies apply to specific files or metadata.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Session policy
Why it's wrong here
Session policies control app access and actions in real time, not for alerting on anomalous activity.
✓
Anomaly detection policy
Why this is correct
Anomaly detection policies identify unusual user behavior, such as mass downloads, based on learned baselines.
Related concept
Static NAT maps one inside address to one outside address.
✗
OAuth app policy
Why it's wrong here
OAuth app policies govern third-party app permissions, not user behavior.
✗
File policy
Why it's wrong here
File policies monitor file metadata and sharing, not aggregate download counts.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
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
How to think about this question
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.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
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
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 SC-900 question in full detail.
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.
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..
What is the correct answer to this question?
The correct answer is: Anomaly detection policy — Anomaly detection policies use machine learning to detect unusual user behavior based on historical baselines, such as mass file downloads. Activity policies are rule-based but require explicit thresholds; however, the scenario describes behavior that is best detected by an anomaly detection policy because it adapts to typical usage patterns. Option A is wrong because session policies control real-time access. Option C is wrong because OAuth app policies govern app permissions. Option D is wrong because file policies apply to specific files or metadata.
What should I do if I get this SC-900 question wrong?
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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. A company uses Microsoft Defender for Cloud Apps to protect its SaaS apps. The security team needs to detect when a user downloads more than 100 files from SharePoint Online within 10 minutes. Which policy type should they create?
medium
✓ A.Anomaly detection policy
B.Activity policy
C.Threat detection policy
D.Compliance policy
Why A: Anomaly detection policies in Defender for Cloud Apps use behavioral analytics to detect unusual patterns like mass file download. Activity policy is for specific activities, but anomaly detection is better for this scenario. Option A is wrong because it's a generic term; Option B is wrong because it's for threat detection; Option D is wrong because it's for compliance.
Last reviewed: Jun 21, 2026
Question Discussion
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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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