The answer is Microsoft Defender for Cloud Apps. This solution is correct because it provides impossible travel detection, a cloud access security broker (CASB) capability that uses machine learning to analyze sign-in events across both Microsoft 365 and third-party SaaS apps, flagging any two logins from geographically distant locations within a time frame that makes physical travel impossible. On the SC-900 exam, this concept tests your understanding of how Microsoft Defender for Cloud Apps protects hybrid and multi-cloud environments, often appearing as a scenario-based question where you must distinguish it from Microsoft Entra ID’s Identity Protection (which focuses on risk-based sign-ins, not cross-app travel analysis). A common trap is confusing Defender for Cloud Apps with Microsoft Defender for Endpoint, but remember: impossible travel is a cloud app behavior anomaly, not a device-level threat. Memory tip: “Cloud Apps catches the jet-setter” — if a user’s login hops continents in minutes, Defender for Cloud Apps sounds the alarm.
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. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 365 and several third-party SaaS apps. The security team wants to detect when a user signs in from a remote location that is significantly far from their typical sign-in location within a very short time, indicating possible account compromise. Which Microsoft security solution should they use?
Defender for Cloud Apps includes anomaly detection policies like impossible travel that can detect sign-ins from geographically distant locations in a short time.
B
Microsoft Defender for Identity
Why wrong: Defender for Identity focuses on on-premises Active Directory attacks and identities, not cloud app sign-in anomalies.
C
Microsoft Defender for Office 365
Why wrong: Defender for Office 365 protects against threats in email and collaboration tools, not general cloud app anomalies.
D
Microsoft Defender for Endpoint
Why wrong: Defender for Endpoint is for endpoint detection and response on devices, not for cloud app sign-in anomalies.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Defender for Cloud Apps
Microsoft Defender for Cloud Apps (MDCA) provides the 'impossible travel' detection capability, which analyzes sign-in events across both Microsoft 365 and third-party SaaS apps. It uses machine learning to establish a baseline of a user's typical sign-in locations and then alerts when two sign-ins occur from geographically distant locations within a time frame that makes physical travel impossible, indicating a potential account compromise.
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 Defender for Cloud Apps
Why this is correct
Defender for Cloud Apps includes anomaly detection policies like impossible travel that can detect sign-ins from geographically distant locations in a short time.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft Defender for Identity
Why it's wrong here
Defender for Identity focuses on on-premises Active Directory attacks and identities, not cloud app sign-in anomalies.
✗
Microsoft Defender for Office 365
Why it's wrong here
Defender for Office 365 protects against threats in email and collaboration tools, not general cloud app anomalies.
✗
Microsoft Defender for Endpoint
Why it's wrong here
Defender for Endpoint is for endpoint detection and response on devices, not for cloud app sign-in anomalies.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Defender for Cloud Apps with Microsoft Defender for Identity, assuming identity protection covers all sign-in anomalies, but MDCA specifically handles cross-cloud app behavioral analytics like impossible travel, while Defender for Identity is limited to on-premises AD and hybrid identity threats.
Detailed technical explanation
How to think about this question
Impossible travel detection in MDCA works by comparing the geolocation (derived from IP address) and timestamp of each sign-in event against the user's historical profile. If two sign-ins occur within a window shorter than the minimum flight time between those locations (e.g., a sign-in from New York and another from London within 2 hours), an alert is generated. MDCA integrates with identity providers (IdPs) via app connectors and conditional access app control to monitor both first-party and third-party SaaS apps like Salesforce or Box.
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.
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: Microsoft Defender for Cloud Apps — Microsoft Defender for Cloud Apps (MDCA) provides the 'impossible travel' detection capability, which analyzes sign-in events across both Microsoft 365 and third-party SaaS apps. It uses machine learning to establish a baseline of a user's typical sign-in locations and then alerts when two sign-ins occur from geographically distant locations within a time frame that makes physical travel impossible, indicating a potential account compromise.
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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