Data Protection Issues

How to Configure Microsoft 365 DLP for Auto-Labeling and Third-Party Apps

John Wilson Sep 28, 2026 868 views

Question details

The user wants to know if Microsoft 365 Business Premium supports automatic sensitivity labeling, how it compares to manual labeling, and whether DLP policies can block sensitive data transfers through third-party apps like WhatsApp and LINE.

Microsoft 365 DLP: Auto-Labeling and Third-Party App Protection

Product: Microsoft 365 Business Premium
Device & OS: not provided
Scenario: Configuring data loss prevention (DLP) and sensitivity labels to protect business data across unmanaged applications.
Observed behavior: Seeking clarification on license capabilities for auto-labeling and the extent of endpoint DLP coverage for third-party messaging software.

Before you start

Ensure you have access to the Microsoft Purview compliance portal with Compliance Administrator rights, and verify your organization's Microsoft 365 Business Premium license features.

Solution 1Recommended

Configure Endpoint DLP to Manage Third-Party Applications

Use Microsoft Endpoint DLP policies to monitor or block sensitive data transfers to unauthorized applications like WhatsApp and LINE.

Microsoft 365 Business Premium includes basic Endpoint DLP capabilities, but blocking specific third-party desktop apps requires configuring endpoint policies in Microsoft Purview.

Keep in mind that while M365 can monitor clipboard actions and file uploads on managed devices, full control over unsanctioned cloud services might require Microsoft Defender for Cloud Apps.

Access the compliance portal

Go to the Microsoft Purview compliance portal and navigate to Data loss prevention > Endpoint DLP settings.

Add unallowed applications

Under 'Unallowed apps', click 'Add or edit unallowed apps' to specify restricted software.

Enter executable names

Enter the exact executable names for the third-party apps (e.g., WhatsApp.exe, LINE.exe) to block them from accessing sensitive files.

Apply to a DLP policy

Create or modify a DLP policy in Purview to apply these endpoint restrictions to your designated Windows or macOS devices.

Configure Endpoint DLP to Manage Third-Party Applications

License Requirements: Always verify your current Business Premium documentation, as advanced auto-labeling and deep cloud app security features often require Microsoft 365 E5 or additional compliance add-ons.

Solution 2

Review Sensitivity Labeling Capabilities

Understand the distinction between manual and automatic labeling to choose the right data protection strategy for your license tier.

Free Microsoft Office alternative

Try WPS Office for Secure and Lightweight Document Management

While Microsoft 365 offers advanced compliance portals, managing complex DLP policies can be expensive and resource-intensive for small teams. If you are looking for a highly compatible, cost-effective Office suite without the heavy administrative overhead, WPS Office provides an excellent alternative. It offers powerful document creation, local file encryption, and seamless deployment.

1. Download the software: Visit the official WPS Office website and download the free installer for your operating system.
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3. Open existing files: Launch WPS Office and directly open your existing Microsoft Office documents without needing format conversions.

Free to use with a familiar, easy-to-learn interface.High compatibility with Microsoft Word, Excel, and PowerPoint formats (.docx, .xlsx, .pptx).Lightweight application that runs smoothly on older devices and conserves system resources.Built-in PDF editing and local file encryption features to help maintain basic data protection.

Frequently Asked Questions

Does Microsoft 365 Business Premium support automatic sensitivity labeling?

Business Premium primarily focuses on manual sensitivity labeling for documents and emails. Advanced automatic labeling features (like service-side auto-labeling for data at rest) generally require an E5 license or specific Microsoft 365 compliance add-ons.

Can Microsoft 365 DLP block data sharing on web-based WhatsApp?

Yes, by configuring Endpoint DLP and web browser restrictions within the Microsoft Purview compliance portal, you can prevent users from uploading sensitive files to unsanctioned web browsers and websites, including web messaging platforms.

What is the difference between manual and auto-labeling in Microsoft 365?

Manual labeling requires the user to consciously apply a security classification to a document or email. Auto-labeling automatically scans content for sensitive information (like financial data or PII) and applies the corresponding label without user intervention, ensuring consistent policy enforcement.

Microsoft Office Security Issues