SC-401 Exam Dumps - Administering Information Security in Microsoft 365

When you configure Microsoft Purview DLP policies for the Teams chat and channel messages location, the following entities are protected:

1:1 and n:n chats (private chats between two or more users).

Team channel messages (including the General channel and all standard channels).

Private channel messages.

This means that if a DLP policy is applied to User1 and User2, it will monitor and enforce rules across:

Chats between User1 and User2 (1:1 or group chats).

Any channel conversations they participate in (General or other channels).

Private channels they belong to.

Incorrect options:

A (1:1/n chats and general channels only) → Excludes private channels, but DLP supports them.

B (1:1/n chats and private channels only) → Excludes general channels, but DLP supports them too.

To enable support for sensitivity labels in Microsoft SharePoint Online, you must configure the setting in the SharePoint admin center.

Sensitivity labels in SharePoint Online allow labeling and protection of files stored in SharePoint and OneDrive. This feature must be enabled in the SharePoint admin center → Settings → Information protection to allow sensitivity labels to apply encryption and protection to stored documents.

To allow users to apply retention labels to individual documents in Microsoft SharePoint libraries, you need to create a retention label and publish the label.

In Microsoft Purview, retention labels define how long content should be retained or deleted. You must first create a label that specifies the retention rules. After creating the label, you must publish it so that it becomes available for users in SharePoint document libraries. Once published, users can manually apply the retention label to individual documents.

The issue: Users cannot upload documents with U.S. passport numbers to a legitimate travel management website because Endpoint DLP is blocking it.

Solution: Configure Service domains in Endpoint DLP → this allows defining specific trusted domains where uploads of sensitive information are permitted while still blocking uploads to other, non-approved domains.

Why not others?

Unallowed browsers: Restricts/blocklists browsers, not the issue here.

File path exclusions: Excludes local folders/paths from monitoring, irrelevant to web uploads.

Unallowed apps: Restricts desktop apps, not browser-based sites.

You need to define a custom sensitive information type that recognizes the unique 13-digit identifier format for customer records. Microsoft Purview DLP policies use these types to identify and protect sensitive data.

A Data Loss Prevention (DLP) policy is required to enforce the rules. It will allow emails with a single identifier but trigger an approval workflow when two or more identifiers are detected.

Trainable classifiers in Microsoft Purview learn from sample documents. When the initial results are unsatisfactory, retraining is done by reviewing and reclassifying items through Content explorer under the Data classification section of the Purview compliance portal. This allows you to give feedback by marking documents as “relevant” or “not relevant” to improve classifier accuracy.

The other options do not support retraining:

Labels from Information protection → Used to configure and manage sensitivity labels, not train classifiers.

Labels from Information governance → Used for retention labels, not classifiers.

Content search → Used for eDiscovery and searching content, not classifier training.