SC-401 Administering Information Security in Microsoft 365 Question and Answers

To review a Microsoft 365 Copilot usage report, you need to use Data Security Posture Management for AI (DSPM for AI) in the Microsoft Purview portal. DSPM for AI provides insights into AI-related activities, including Copilot usage, risk assessments, and data security posture related to AI interactions within Microsoft 365.

Creating an app discovery policy in Microsoft Defender for Cloud Apps is used for detecting and monitoring cloud application usage, but it does not prevent a locally installed application (Tailspin_scanner.exe) from accessing sensitive files on Windows 11 devices.

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.

The False positive and override report helps identify rules that were applied but did not generate an actual policy alert, which means they were overridden or deemed false positives.

The DLP policy matches report provides details on files that matched DLP policies, including the top 10 files.

The Incident reports report helps analyze and review alerts, including those that may have been miscategorized.

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:

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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).

The requirement states that all Microsoft 365 data for users must be retained for at least one year. In Microsoft 365, retention policies must be configured for each type of data storage.

Step 1: Identifying Where Data is Stored

From the case study, users store data in the following locations:

● SharePoint Online sites

● OneDrive accounts

● Exchange email

● Exchange public folders

● Teams chats

● Teams channel messages

Since these locations fall under two broad categories:

● Microsoft Exchange data (Emails, Public folders)

● SharePoint, OneDrive, and Teams data

Step 2: Required Retention Policies

1️. A single retention policy can cover:

● SharePoint Online

● OneDrive

● Microsoft Teams

2. A second retention policy is required for:

● Exchange (Emails & Public Folders)

Thus, the minimum number of retention policies required to meet the requirement is 2.

Microsoft 365 retention policies can be applied broadly across multiple services with just two policies:

● One for Exchange & Public Folders

● One for SharePoint, OneDrive, and Teams

There's no need for separate policies for each individual workload unless different retention durations are required, which is not stated in the requirement.

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The goal is to automatically label documents in Site1 that contain credit card numbers. To achieve this, we need a sensitivity label with an auto-labeling policy based on a sensitive info type that detects credit card numbers.

Step 1: Create a Sensitive Info Type

● A sensitive info type is needed to detect credit card numbers in documents.

● Microsoft Purview includes built-in sensitive info types for credit card numbers, but we can also create a custom one if necessary.

Step 2: Create a Sensitivity Label

● A sensitivity label is required to classify and protect documents containing sensitive information.

● This label can apply encryption, watermarking, or access controls to credit card data.

Step 3: Create an Auto-Labeling Policy

● An auto-labeling policy ensures that the sensitivity label is applied automatically when credit card numbers are detected in Site1.

● This policy is configured to scan files and automatically apply the correct sensitivity label.

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Understanding DLP Policy Impact on File Access

The DLP policy (DLPpolicy1) applies to Site2 and restricts access when:

● Content contains SWIFT Codes.

● Instance count is 2 or more.

File Analysis (Based on SWIFT Codes Count)

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Files that remain accessible (not restricted by DLP):

● File1.docx (Contains only 1 SWIFT Code → Below restriction threshold)

User access after DLP policy is applied:

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User1 (Site Owner):

● Has higher privileges and can override DLP restrictions (through admin intervention).

● Can access 2 files (File1.docx + override access to another file).

User2 (Site Visitor):

● Has read-only access but DLP blocks access to restricted files.

● Can only access 1 file (File1.docx), since all others are restricted.

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To detect and protect confidential documents, we need a custom rule to identify project codes that start with 999 (since they are classified as confidential).

Box 1: A Sensitive Info Type (SIT) allows Microsoft Purview DLP policies to recognize structured data (e.g., project codes). DLP policies require a sensitive info type to detect content based on patterns, keywords, or dictionary terms. A sensitivity label alone does not define detection logic—it is used for classification and protection after content is identified.

Box 2: Since project codes follow a structured 10-digit pattern, we should use a Regular Expression (Regex) to match project codes that start with 999.

Example Regex pattern:

999\d{7}

This pattern detects a 10-digit number starting with "999".

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Understanding Site4's Retention Policies:

● Site4RetentionPolicy1 deletes items older than 2 years from creation. If a file was created on January 1, 2021, it would be deleted after January 1, 2023.

● Site4RetentionPolicy2 retains files for 4 years from creation. If a file was created on January 1, 2021, it will be kept until January 1, 2025, but not deleted after that (policy states "Do nothing").

Statement 1 - Yes, because Site4RetentionPolicy2 ensures files are retained for 4 years.

Statement 2 - Yes, because Site4RetentionPolicy2 retains the file for 4 years (until January 1, 2025).

Statement 3 - No, because retention is only for 4 years (until January 1, 2025). After that, the policy does "nothing," meaning the file is no longer recoverable after that period.

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.

Statement 1 - No. The sensitivity label includes content marking (watermark: INTERNAL), but it only applies to documents where the label is manually or automatically applied, not to all documents by default.

Statement 2 - No. The sensitivity label only specifies a watermark, not a header. If a header marking was configured, it would explicitly appear in the label settings.

Statement 3 - No. There is no indication that auto-labeling is configured to apply the label only to documents with the word "rebranding". Auto-labeling is an optional setting that needs explicit configuration.

To validate whether an audit log retention policy will apply to the intended entries, you should configure the following fields:

● Date and time range (UTC) ensures that you are searching for audit logs within the time period when the policy should be applied. Audit logs are time-sensitive, and policies affect logs based on their timestamp.

● Record types allows you to filter and search for specific audit log categories (e.g., Exchange, SharePoint, Teams, etc.) that are affected by the retention policy. Selecting the correct record type ensures that the policy is evaluated against the relevant data.

In Microsoft Purview Data Lifecycle Management, different Microsoft 365 locations require separate retention policies because they fall under different storage and compliance models.

Teams Chats & Teams Channel Messages (1 Policy) require a separate retention policy because Teams messages are stored differently than Exchange and SharePoint content. One policy can cover both Teams chats and Teams channel messages. Exchange Email (1 Policy) requires its own separate policy since emails are managed differently than Teams or SharePoint content. SharePoint Sites & Microsoft 365 Groups (1 Policy) are both stored in SharePoint Online, so they can be managed under one policy.