SC-401 Microsoft Administering Information Security in Microsoft 365 Free Practice Exam Questions (2026 Updated)

To ensure that encrypted email messages sent to external recipients can be revoked or expire within seven days, you need to configure a sensitivity label with encryption settings in Microsoft Purview Information Protection. A sensitivity label allows you to encrypt emails and documents, set expiration policies (e.g., emails expire after 7 days), and enable email revocation

How to configure it?

● Go to Microsoft Purview compliance portal → Information Protection

● Create a sensitivity label

● Enable encryption and configure the content expiration policy

● Publish the label to users

Statement 1 - No. User1 is included in JIT protection. File1.docx is on Device1, which is onboarded to Microsoft Defender. However, File1.docx has not been evaluated for file classification, meaning JIT cannot enforce protection on it. If User2 signs in to Device2 and attempts to attach File2.pdf to an email, JIT will block the action.

Statement 2 - No. User2 is not configured for JIT protection (JIT does not apply to them). File2.pdf has been evaluated for classification, but since User2 is not included in JIT protection, no blocking occurs. If User3 attempts to copy File3.xlsx to a network share, JIT will generate an audit event.

Statement 3 - No. User3 is included in JIT protection. However, Device3 is not onboarded to Microsoft Defender, meaning JIT protection cannot enforce actions on it. File3.xlsx has not been evaluated, so even if the device were onboarded, JIT would not have classification data to act upon.

The Service domains setting in Microsoft 365 Endpoint Data Loss Prevention (Endpoint DLP) allows administrators to block or allow specific domains for file uploads. The goal is to prevent users from uploading DLP-protected documents to web1.contoso.com and web2.contoso.com.

Setting the Service domains to " web1.contoso.com and web2.contoso.com " precisely targets the two specific third-party websites, minimizing administrative effort while ensuring strict control.

Policy tips in DLP: Policy tips are messages shown to users when their action (such as sending sensitive content via email) conflicts with a DLP policy.

For Exchange email location, policy tips are supported in the following apps:

Outlook for Microsoft 365 (desktop client) ✅

Outlook on the web (OWA) ✅

Outlook Mobile (iOS/Android) ❌ Policy tips are not shown in mobile apps. Instead, DLP actions (block/restrict/send incident report) still apply, but the user does not see a policy tip notification.

Therefore:

Supported: Outlook for Microsoft 365, Outlook on the web.

Not supported: Outlook Mobile apps.

Activity Explorer logs a DLP rule match event each time any DLP rule condition is met on a file.

File1 matches Rule11 and Rule12 → 2 events

File2 matches Rule21 and Rule22 → 2 events

File3 matches Rule11 and Rule22 → 2 events

Total events in Activity Explorer = 2 + 2 + 2 = 6.

Microsoft notes that Activity explorer shows granular DLP activities such as policy rule matches per item.

The DLP incidents report aggregates by policy match per item, not by each rule in that policy. Multiple rules from the same policy on the same item count as one incident; if different policies match the same item, each policy creates its own incident.

File1: Rules from DLP1 only → 1 incident

File2: Rules from DLP2 only → 1 incident

File3: One rule from DLP1 and one from DLP2 → 2 incidents

Total incidents = 1 + 1 + 2 = 4.

To implement Microsoft Purview Data Lifecycle Management for SharePoint Online (Site1), you need to create a retention label first. Retention labels define how long content should be retained or deleted based on compliance requirements. Once a retention label is created, it can be manually or automatically applied to content in SharePoint Online, Exchange, OneDrive, and Teams. After creating a retention label, you can configure label policies to apply them to Site1 and other locations.

An activity policy in Microsoft Defender for Cloud Apps (Microsoft Defender portal) allows you to track and alert on specific user actions, such as sharing sensitive documents externally from OneDrive. This policy can detect file-sharing activities and send alerts when files are shared with external users, which meets the requirement.

A Preservation Lock in Microsoft Purview Retention Policies enforces strict compliance and prevents certain modifications to ensure data is retained according to compliance requirements.

When a Preservation Lock is applied:

1. You cannot disable or delete the policy.

2. You cannot remove locations from the policy.

3. You cannot decrease the retention period.

4. You can add locations to the policy.

5. You can increase the retention period.

You can expand the retention policy to cover additional locations (e.g., more Exchange mailboxes, SharePoint sites). You can extend the retention duration (e.g., increase from 5 years to 10 years) since this aligns with stricter compliance.

To meet the requirement that all administrative users must be able to create Microsoft 365 sensitivity labels, we need to assign the Sensitivity Label Administrator role to the correct users.

Sensitivity Label Administrator Role Responsibilities

This role allows users to:

● Create and manage sensitivity labels in Microsoft Purview.

● Publish and configure auto-labeling policies.

● Modify label encryption and content marking settings.

Review of Admin Roles from the Table:

Users that must be assigned the Sensitivity Label Administrator role:

● Admin2 (Compliance Data Administrator)

● Admin3 (Compliance Administrator)

● Admin1 (Global Reader) (should be assigned this role to fulfill the requirement that all admins can create labels).

EDM does not store raw data; instead, it requires hashed versions of sensitive data for privacy and security. To upload the hashed data, Microsoft provides the EDM upload agent. This ensures that the data is securely processed and recognized by the EDM service in Microsoft 365.

You need one Sensitive Information Type (SIT) per distinct information pattern. The minimum set that covers both SharePoint and Exchange is:

Credit Card Number (builtin) – used for documents and email.

UK National Health Service Number (builtin) – used for documents and email.

EU/UK Physical Address (builtin “ EU PII: Physical address ” ).

User credentials (builtin “ Credentials ” / “ User credentials ” ).

Custom keywordbased SIT for the sensitive project names ( “ Project Tailspin ” , “ Project Contoso ” , “ Project Falcon ” ) – can be one SIT using a keyword list.

SITs are reusable across locations, so you don’t count duplicates for email and documents.

To ensure User1 can perform insider risk management tasks only for the users and devices in Office1, the first step is to create an administrative unit in Microsoft Entra ID (formerly Azure AD).

Administrative units allow you to scope permissions to specific users, devices, and locations. By creating an administrative unit for Office1 and assigning User1 to the Insider Risk Management Admins role group within that unit, User1 will only have access to users and devices in Office1.

Microsoft Purview browser extensions for Endpoint DLP are supported on:

● Windows 10/11 (Config1)

● macOS (Config2)

● Not supported on Android (Config3)

Since Microsoft Purview does not support browser extensions on Android, Config3 is excluded from both Google Chrome and Firefox.

Let’s break it down:

File1.docx → DLP action = None

No DLP restrictions, so it is fully accessible to both User1 (owner) and User2 (member).

File2.docx → DLP action = Matched by DLP

“Matched” means the DLP policy detected sensitive content but has not blocked access. Instead, it may generate an alert or policy tip.

Both User1 and User2 can still open this file.

File3.docx → DLP action = Blocked by DLP

“Blocked” means the DLP policy actively restricts access or sharing of the file.

User2 (member) cannot open this file.

However, User1 (site owner) can open it because site collection admins and owners always retain full control over content, even if a DLP rule applies.

Ref: Microsoft Purview DLP policy tips and enforcement

→ DLP policies do not prevent SharePoint/OneDrive site collection admins (owners) from accessing content.

✅ Final Answer Table:

User1 (Site Owner): File1.docx, File2.docx, File3.docx

User2 (Site Member): File1.docx, File2.docx

Marking Tailspin_scanner.exe as " Unsanctioned " in Microsoft Defender for Cloud Apps only blocks its usage in cloud-based activities (such as accessing SharePoint, OneDrive, or Exchange Online). However, it does not prevent a locally installed application on Windows 11 devices from accessing sensitive files.

To block Tailspin_scanner.exe from accessing sensitive documents while allowing it to access other files, the correct solution is to use Microsoft Purview Endpoint Data Loss Prevention (Endpoint DLP) and add Tailspin_scanner.exe to the Restricted Apps list.

Endpoint DLP allows you to block specific applications from accessing sensitive files while keeping general access available. Restricted Apps List in Endpoint DLP ensures that Tailspin_scanner.exe cannot open, copy, or process protected documents, but it can still function normally for non-sensitive content.

Comprehensive Detailed Explanation with References

Exact Data Match (EDM) classifiers are designed to identify highly sensitive structured data (like customer IDs, account numbers) with higher accuracy.

EDM classifiers can only be used within Data Loss Prevention (DLP) policies in Microsoft Purview.

They cannot be used in Insider Risk Management or Retention policies.