The answer is Microsoft Purview Audit, which is the correct choice because it provides the unified audit log search capabilities needed to investigate historical activities like file access, email actions, and sign-in events from two months ago. This solution, available in both Audit (Standard) and Audit (Premium) tiers, ingests and stores user and admin actions across Microsoft 365 services, allowing security teams to query past activities for forensic analysis. On the SC-900 exam, this question tests your understanding of which Purview solution handles log-based incident investigation, often appearing as a scenario where you must distinguish Audit from other tools like eDiscovery or Compliance Manager. A common trap is confusing Audit with Microsoft Defender for Cloud Apps, but remember that Purview Audit is the dedicated log search tool for historical user activity. Memory tip: think “Audit = Activity Log” to link the solution directly to searching past actions.
SC-900 Practice Question: Describe the capabilities of Microsoft compliance solutions
This SC-900 practice question tests your understanding of describe the capabilities of microsoft compliance 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.
An organization's security team needs to investigate a security incident that occurred two months ago. They need to search the unified audit log for specific activities performed by a user, such as file access, email actions, and sign-in events, to understand the scope of the compromise. Which Microsoft Purview solution provides these audit log search capabilities?
Why wrong: eDiscovery is used for searching and preserving content for legal cases, not for searching audit log entries for user activities.
B
Microsoft Purview Audit
Audit provides the ability to search the unified audit log for historical user and administrator activities across Microsoft 365, meeting the investigation need.
C
Microsoft Purview Data Lifecycle Management
Why wrong: Data Lifecycle Management focuses on retention and deletion policies, not auditing user activities.
D
Microsoft Purview Communication Compliance
Why wrong: Communication Compliance is designed to detect policy violations in email and Teams communications, not to search audit logs for general activities.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Purview Audit
Microsoft Purview Audit (specifically Audit (Standard) or Audit (Premium)) provides the ability to search the unified audit log for activities like file access, email actions, and sign-in events. This solution is designed for forensic investigation of user and admin activity within Microsoft 365, making it the correct choice for investigating a security incident that occurred two months ago.
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 Purview eDiscovery
Why it's wrong here
eDiscovery is used for searching and preserving content for legal cases, not for searching audit log entries for user activities.
✓
Microsoft Purview Audit
Why this is correct
Audit provides the ability to search the unified audit log for historical user and administrator activities across Microsoft 365, meeting the investigation need.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft Purview Data Lifecycle Management
Why it's wrong here
Data Lifecycle Management focuses on retention and deletion policies, not auditing user activities.
✗
Microsoft Purview Communication Compliance
Why it's wrong here
Communication Compliance is designed to detect policy violations in email and Teams communications, not to search audit logs for general activities.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse eDiscovery (which deals with legal holds and content search) with Audit (which deals with activity logs), leading them to select eDiscovery when the question specifically asks for searching user activities like file access and sign-in events.
Detailed technical explanation
How to think about this question
The unified audit log in Microsoft 365 is powered by the Office 365 Management Activity API, which records events from Exchange Online, SharePoint Online, Azure AD, and other services. Audit (Premium) extends retention to 1 year (or up to 10 years with add-ons) and provides high-value events like MailItemsAccessed and Send, which are critical for investigating advanced persistent threats. In a real-world scenario, a security team would use Audit (Premium) to search for specific user activities like 'FileAccessed' or 'UserLoggedIn' within a date range, leveraging the AuditLogSearch PowerShell cmdlet or the Purview compliance portal.
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 compliance solutions — This question tests Describe the capabilities of Microsoft compliance solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft Purview Audit — Microsoft Purview Audit (specifically Audit (Standard) or Audit (Premium)) provides the ability to search the unified audit log for activities like file access, email actions, and sign-in events. This solution is designed for forensic investigation of user and admin activity within Microsoft 365, making it the correct choice for investigating a security incident that occurred two months ago.
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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