(Preview) Dynamic watermarking available on Android and iOS with new date-time variable

Sensitivity labels in Microsoft Purview Information Protection provide powerful controls to restrict access to sensitive files and prevent users from taking inappropriate actions, such as printing documents, while still allowing unhindered collaboration. However, users can take pictures of sensitive information on their screens or presentations shared online or in person, and some forms of screen capture cannot be blocked by existing technologies. This vulnerability provides an easy way to bypass the protection that sensitivity labels apply to documents.

In July we Announcing a public preview of dynamic watermarking.New capabilities for sensitivity labels in Word, Excel, and PowerPoint prevent users from leaking sensitive information and prevent property leaks when they do occur. Today, we’re excited to announce an expansion of the feature. Dynamic watermarking is now available in preview on Android and iOS, and admins can now add date-time variables to dynamic watermark display strings.

With the release of Android and iOS, you can now label your files with dynamic watermarking labels and view, edit, and collaborate on them regardless of the platform you use.

Figure 1: Dynamic watermarking example

Adding a date-time variable to the dynamic watermark string allows administrators to know the exact moment when the leaked information was captured.

Figure 2: Adding a date-time variable to a dynamic watermark

See the minimum version required to preview dynamic watermarking on all platforms: Minimum version for sensitivity labels in Microsoft 365 apps | Microsoft Learn.

To learn more about configuring dynamic watermarking on your labels, see: Enforce encryption using sensitivity labels | Microsoft Learn