Microsoft Updated SC-401 Exam Questions and Answers by alys

Box 1: Since you are looking for a specific pattern (PA followed by eight digits, e.g., PA 12345678), the best classification method is Sensitive Info Type. Sensitive Info Types allow pattern-based matching to identify structured data. Exact Data Match (EDM) is not needed because you're not comparing against a fixed dataset. Trainable classifier is not appropriate because this is a structured pattern, not an unstructured document classification.

Box 2: Since PA 12345678 follows a structured pattern, the most effective method is Regular Expression (Regex). A Regular Expression (Regex) can be written to match "PA" followed by exactly eight digits (e.g., PA\s\d{8}). Keyword dictionary is not ideal because it works for predefined words, not number patterns. Function is unnecessary because there is no need for checksum validation or predefined validation rules.

Microsoft Endpoint DLP relies on Microsoft Defender for Endpoint (MDE) for its enforcement.

Onboarding Windows 10/11 devices to Defender for Endpoint ensures the Endpoint DLP policies can be applied, including monitoring and protecting content across apps and browsers.

Step 1 – Scenario

The alert in the exhibit is named Alert2.

Current status = Resolved.

The task is to identify which statuses you can change the alert to.

Step 2 – Microsoft 365 Alert Lifecycle

In Microsoft 365 compliance and security alerts, an alert can move between multiple statuses depending on investigation and remediation. The available statuses are:

Active – The alert is new and not yet acted upon.

Investigating – The alert is under review.

Resolved – The alert has been addressed.

Dismissed – The alert is ignored or deemed not relevant.

Step 3 – Status changes from "Resolved"

If an alert is in the Resolved state, administrators can reopen or reclassify it. According to Microsoft documentation, from Resolved, you can change it to:

Active

Investigating

Dismissed

This allows flexibility in continuing investigations if needed or dismissing false positives.

Step 4 – Microsoft Reference

From Microsoft Docs: “You can change the status of an alert between Active, Investigating, Resolved, and Dismissed to reflect its current stage in the triage process.”

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.