MC1304289 – M365 Change Digest

One-line summary

Lock-free coauthoring in Word lets multiple users edit the same paragraph at once, improving collaboration; rollout starts mid-May 2026 and is enabled by default on supported clients.

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Details

Summary

Lock-free coauthoring in Microsoft Word allows multiple users to edit the same paragraph simultaneously, enhancing real-time collaboration. It will roll out globally from mid-May to early June 2026, enabling the feature by default without admin action. Older versions fallback to existing coauthoring; no changes to permissions or storage.

Body (from Message Center)

[Introduction]

Lock-free coauthoring improves real-time collaboration in Microsoft Word by allowing multiple users to edit the same paragraph simultaneously. This enhancement reduces edit conflicts and interruptions, helping teams collaborate more efficiently. The feature is automatically enabled when supported, based on document compatibility and user environments.

[When this will happen:]

General Availability (Worldwide, GCC, GCC High, DoD): We will begin rolling out in mid-May 2026 and expect to complete by early June 2026.

[How this affects your organization:]

Who is affected:

All users collaborating on Word documents when using supported versions of Word on desktop and web.

[What will happen:]

Users can edit the same paragraph at the same time when the feature is supported in a session.
Word will automatically enable lock-free coauthoring — no admin configuration required.
If unsupported scenarios are detected (for example, older client versions or unsupported content types):
- Word will fall back to the existing coauthoring experience.
- Users may temporarily be unable to edit the same paragraph concurrently.
There is no change to file storage, sharing permissions, or document access workflows.
The feature is enabled by default when conditions are met.
Existing collaboration features and policies remain unchanged.

[What you can do to prepare:]

No action is required.
Communicate this update to users who frequently coauthor documents to set expectations.
Encourage users to keep Word clients updated to maximize compatibility with lock-free coauthoring.
Update internal documentation or training materials for collaboration best practices if needed.

Learn more: About lock-free coauthoring in Word | Microsoft Support

[Compliance considerations:]

No compliance considerations identified, review as appropriate for your organization.

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