Table of Contents
Summary
- Archive file classification behavior will be updated on Windows endpoints to enhance performance and consistency.
- Outer archive files will be classified directly, while internal files will not generate individual events.
- No admin or user action is needed for this change.
- Organizations should consider updating internal documentation on classification behavior if applicable.
Admin Impact: Low
User Impact: Low
Release Start: 27 Nov 2025
Release End: 30 Nov 2025
Services: Purview
Category: Stay informed
Tags: Admin Action
History
11/26/2025 Item Added to Message Center
Microsoft Message
Introduction
We are updating archive file classification behavior on Windows endpoints to align with cloud workloads. This change improves consistency, reduces noise in event reporting, and enhances performance when processing archive files.
When this will happen
The change will begin rolling out late November 2025 and will apply automatically.
How this affects your organization
Who is affected: All organizations using Windows endpoints with archive file classification enabled.
What will happen:
- Outer archive files (e.g., .zip, .rar) will now be classified directly.
- Classification will be atomic for improved consistency and reduced latency.
- Internal files within archives will no longer generate individual events; only the outer archive file will be reported.
- Context and label-based rules will not apply to files inside the archive.
- No admin or user action is required for this change to take effect.
What you can do to prepare
- No action is required.
- If you maintain internal documentation on classification behavior, consider updating it to reflect these changes.
Compliance considerations
No compliance considerations identified, review as appropriate for your organization.