Community Q&A

SC-400 — frequently asked questions

Community-vetted answers to 60 common questions about this exam, each traced back to a specific practice question.

Questions from real practice questions

Each Q&A comes from a specific question — follow the link for the full analysis

What Tool Reviews DLP Policy Matches in Microsoft 365?

Why is Content explorer wrong for reviewing DLP policy matches?

Content explorer shows sensitive content found by classification, not DLP rule match events. Activity explorer is the tool that records DLP policy matches across workloads.

Does Activity explorer show DLP matches from endpoint devices?

Yes. Activity explorer includes endpoint DLP matches from Windows 10/11 and recent macOS devices, plus Exchange, SharePoint, OneDrive, Teams, and on-premises sources.

When Does Sensitivity Label Content Expiry Apply to an Already Labeled Document?

Does changing the content expiry period on Label1 affect already labeled documents like Doc1?

No. Expiry is embedded when the label is applied, so Doc1 keeps its original 21-day period and access ends January 24.

Why doesn't User2 editing Doc1 on January 4 reset the content expiry date?

Editing or saving labeled content does not re-stamp the label's expiration metadata; only re-applying the label would recalculate it.

Retraining Trainable Classifiers in Microsoft Purview

Why can't I retrain Classifier2?

Classifier2 is published. Microsoft Purview does not support retraining published custom classifiers to maintain policy stability.

How do I fix an inaccurate published classifier?

You must remove the existing classifier and create a new one with additional training samples to improve accuracy.

Manage Microsoft 365 Alert Status

Can I change an alert from Resolved back to Active?

Yes. If an alert has been marked as Resolved, an administrator can change its status back to Active or Investigating to continue the review process.

What are the exact status values for SC-400 alerts?

The four valid statuses are Active (default), Investigating, Resolved, and Dismissed.

Enforcing Sensitivity Labels for Microsoft 365 Groups

Why can't I add a dynamic group to a sensitivity label policy?

Sensitivity label policies do not support dynamic groups as a target scope. You must use auto-labeling policies to target users in dynamic groups.

Is the AIP unified labeling client still required for SC-400?

No, the legacy AIP unified labeling client is deprecated. Modern solutions use built-in Office apps and auto-labeling agents.

Does Set-Mailbox AuditEnabled Meet Delegate Sign-In Audit Goal?

Why doesn't Set-Mailbox -AuditEnabled $true log delegate sign-ins?

Mailbox auditing is on by default, but the MailboxLogin action for delegates must be explicitly added with Set-Mailbox -AuditDelegate @{Add='MailboxLogin'} to record their sign-ins.

What command enables delegate sign-in auditing for User1's mailbox?

Run Set-Mailbox -Identity User1 -AuditDelegate @{Add='MailboxLogin'} to add MailboxLogin to the delegate audit set.

How Many Alerts for SharePoint File Uploads in Purview?

Why doesn't File3.xlsx generate an alert?

The alert policy condition filters on .docx file names, so an .xlsx upload does not match the policy and is not counted as an alert.

Why do multiple .docx uploads produce only one alert?

Microsoft Purview alert aggregation adds matching events that occur within one minute to an existing alert instead of creating a separate alert for each upload.

Activate ISO/IEC 27001:2013 Template in Compliance Manager

Why is the ISO/IEC 27001 template inactive in my E3 environment?

It is inactive because the specific assessments have not been added to your workspace yet. You must click 'Add recommended assessments' to enable it.

Do I need Microsoft 365 E5 to use the ISO/IEC 27001 template?

No. The ISO/IEC 27001:2013 template is included in E3. Only specific premium templates like HIPAA require E5 licensing.

How Do You Define an Information Barrier Segment in Microsoft Purview?

Why can't a Microsoft 365 group be used to define an IB segment like Segment1?

Segments in the Purview compliance portal are defined by attribute-based user group filters. A Microsoft 365 group or distribution list can only be one of the filter criteria, not the segment definition itself.

Where exactly do you create Segment1 and add its user group filter?

In the Microsoft Purview compliance portal under Information barriers > Segments: name the segment first, then the next screen prompts you to add a User Group Filter such as Department eq 'Marketing'.

Which Locations Can Be Configured for a Subject Rights Request?

Why is Teams not a separate search location in a subject rights request?

Teams chats are searched through Exchange Online, and Teams files are searched through SharePoint Online, so the Priva wizard only exposes Exchange and SharePoint as location toggles.

Does selecting Exchange Online search Teams chat messages?

Yes. Exchange Online covers Exchange mailboxes and individual or group Teams chats, which is why Teams does not appear as its own configurable search location.

What to Create First for Insider Risk Management Project Policy?

Why is a priority user group preferred over a security group for insider risk management?

Priority user groups are native to Insider Risk Management and can be selected directly in policy scoping, whereas Entra security groups would add administrative steps and may not support the same risk indicators.

Can I select users directly in the insider risk management policy instead of creating a priority user group first?

Yes, but selecting users manually in each policy increases admin effort and risk of over-scoping. A priority user group centralizes the project team for reuse and minimizes impact.

How to Add an Information Barrier Segment to SharePoint Site1

Why can’t I just run Set-SPOSite to add Segment1 to Site1?

Set-SPOSite performs the association, but Microsoft requires an information barrier policy to link the segment to the site first.

Is enabling information barriers in SharePoint with Set-SPOTenant required first?

It is a tenant-level prerequisite, but the immediate step after creating a segment is to create an information barrier policy that includes it.

Viewing Regex in Built-in Sensitive Info Types

Why can't I view the regex in a built-in sensitive info type?

Built-in types are predefined by Microsoft to ensure stability. The regex is hidden to prevent accidental changes that could break detection accuracy.

Does the Compliance Administrator role allow editing built-in types?

No. This role allows managing policies but cannot modify the core definition of Microsoft's pre-built sensitive info types directly.

How to auto-delete credit card content after 12 months in Microsoft 365?

Why is a sensitivity label not the right choice for automatic deletion?

Sensitivity labels classify, encrypt, and mark content but do not set a retention or deletion period; only retention labels can automatically delete items 12 months after creation.

Do I need to create a new sensitive information type for credit card numbers?

No. Microsoft 365 includes a built-in credit card SIT, and using it minimizes administrative effort; you only need a retention label and an auto-labeling policy for it.

How to make Sublabel1 the default sensitivity label for Group1?

Why is changing the order of Sublabel1 not enough to make it the default?

Label order controls priority or display, not the default label applied by a scoped policy. The policy must explicitly select Sublabel1 as the default for Group1.

Should I delete the Label1 policy before publishing Sublabel1?

No. Deleting the existing policy would unpublish Label1 from Group1 and disrupt other settings; modify the current policy instead.

Modifying a Preservation-Locked Retention Policy RP1

Why can't I remove locations from a preservation-locked retention policy?

The lock prevents removing locations to protect the retention scope; you can only add new locations. This is why option E as 'remove locations' is a trap.

Does a preservation lock allow extending the retention period of RP1?

Yes, extending the retention period is explicitly allowed. The lock only blocks shortening, not lengthening.

Which Components Require Approval for Emails with Two Customer Identifiers?

Why is a mail flow rule not the best choice for the 13-digit customer identifier DLP requirement?

A mail flow rule can inspect sensitive information types, but unified DLP policy natively supports instance-count conditions and approval routing without a separate transport rule.

How does the DLP policy ignore emails with only one customer identifier?

The DLP rule uses the sensitive information type with a minimum instance count of 2, so a single 13-digit identifier does not trigger the approval action.

Which two components meet SharePoint Project1 retention requirements?

Why is an adaptive scope not enough for Project1 retention?

Adaptive scopes help target retention policies to sites, but they do not provide event-based retention triggers; the Project1 milestone requires an event type in a file plan.

Can a sensitivity label replace the file plan and event type?

No. Sensitivity labels classify and protect content but cannot enforce a 10-year retention period followed by event-driven deletion; that requires retention labels from a file plan.

Obtaining Export Key for Microsoft Purview Content Search Download

Why is an export key required instead of just logging in?

The export key provides an additional layer of encryption for the downloaded data package, ensuring that even if the download link is intercepted, the data remains unreadable without the key.

Where do I find the export key after creating the export job?

The export key is displayed when you complete the export job configuration. You should save it securely as it is needed to decrypt the final .zip file containing the search results.

What to Create First to Review GDPR Compliance in Compliance Manager?

Why can't I just create a template instead of an assessment in Compliance Manager?

Templates are the prebuilt regulatory frameworks Microsoft provides, including GDPR. An assessment is what binds that GDPR template to your Microsoft 365 E5 tenant and produces the compliance score and improvement actions.

Does an alert policy for compliance score changes satisfy the GDPR review requirement?

No. An alert policy only notifies you after a score changes; it performs no evaluation. It also depends on an assessment already existing, so it cannot be the first thing you create.

Retain Audit Logs for 10 Years in Microsoft 365 E5

Does the admin need the 10-year license to create the policy?

No. The admin needs appropriate permissions (like Compliance Administrator), but the 10-year license is only required on the user accounts whose logs are being retained.

What does Audit (Premium) add-on provide?

It provides advanced search capabilities and extends retention up to 1 year, but it does not support the 10-year retention period which requires the separate add-on license.

Assign eDiscovery Permissions in Purview

Why can't I assign eDiscovery roles in the M365 admin center?

eDiscovery roles are managed as role groups specifically within the Purview compliance portal to ensure proper segregation of compliance duties.

What role should I assign for viewing eDiscovery cases?

You should assign the 'eDiscovery Manager' role group, which grants permissions to create and manage eDiscovery cases and view results.

Granting Least Privilege Audit Log Search Access

Does the Security Reader role allow searching audit logs?

No, the Security Reader role allows viewing security alerts and reports but does not provide permissions to search the audit log.

Why is the Exchange admin center used for audit roles?

Historically, audit logging was managed through Exchange Online. While Purview is now the central hub, the Exchange-based roles remain valid for granting these specific permissions.

KQL Query for Content Search Recipients

Why is the OR operator used differently here?

In KQL for Purview, listing values in parentheses (A B) implicitly means A OR B. Repeating the field with OR is less efficient and can sometimes cause syntax issues.

Can I use wildcards in the Recipients field?

Yes, but you must use standard wildcard syntax like *. The options provided with #1-2 are invalid KQL syntax.

Microsoft Purview Activity Explorer for DLP and Label Reports

Can Content Search generate a report of all label changes?

No, Content Search finds specific items based on criteria. It does not provide an activity log or trend report of label changes across the tenant.

Is Activity Explorer part of the free trial?

Activity Explorer is available in Microsoft 365 E5 and G5 tenants, as well as standalone Purview plans, providing comprehensive audit and activity insights.

eDiscovery Case Mailbox Search Permissions

Does eDiscovery require Full Access permissions?

No. eDiscovery uses dedicated roles (eDiscovery Manager/Administrator) that grant search access independently of mailbox permissions like Full Access.

Can I prevent users from sending email in eDiscovery?

Yes. eDiscovery provides search-only access. It does not grant the ability to send messages or modify items unless specifically configured in Premium features.

First Step for Insider Risk Management Policy in Microsoft Purview

Why can't I just use Office indicators first?

Office indicators define what sensitive data to look for, but they do not identify which users are at risk. You need HR data to filter policies by employment status.

Does HR connector work for all M365 services?

Yes, the HR data connector provides a unified view of employee status across Microsoft 365 workloads, allowing insider risk policies to apply to SharePoint, Exchange, and Teams.

Microsoft Purview Insider Risk Management Device Onboarding

Why is HR data connector not the answer?

The HR connector provides employee context (like termination date) but does not provide the technical telemetry of file actions needed to detect the suspicious behavior.

Can I use Communication Compliance for file copies?

No, Communication Compliance monitors messages (email, chat). It cannot detect local file operations like copying to a USB drive or printing from a workstation.

Sensitivity Label File Support in Microsoft Purview

Why is .txt not supported for sensitivity labels?

Standard text files lack the container structure required to embed sensitivity metadata tags in most Office clients. Policies may apply to them via other means, but not standard labeling.

Are .doc files really not supported?

Yes, the legacy binary .doc format is not supported for client-side labeling. You must convert files to .docx to apply labels in modern Office applications.

Minimize Effort for Former Employee Data Deletion

Why isn't eDiscovery (Standard) the best choice?

eDiscovery requires manual case setup and content search, increasing administrative effort. Priva SRR automates data discovery and response.

Is Priva included in Microsoft 365 E5?

Base Priva features may be included, but Subject Rights Requests is often a premium add-on or separate entitlement requiring explicit assignment/purchase.