MC1422063 – M365 Change Digest

One-line summary

The OneDrive sync client for Windows will soon better guide users to fix file/folder paths exceeding the 520-character limit, reducing sync errors and support needs.

Similar updates

Details

RoadmapIds

557563

Summary

OneDrive for Business on Windows will improve sync error messages for paths exceeding 520 characters, guiding users to rename or move files without stopping sync. This update, rolling out mid-September to mid-October 2026, requires no admin action and aims to reduce support tickets and user confusion.

Platforms

Desktop

Body (from Message Center)

Updated August 17, 2026: We have updated the timeline. Thank you for your patience.

[What and why]

We are improving the OneDrive sync experience on Windows desktop to provide clearer, more actionable guidance when file and folder paths exceed the supported 520-character limit. The updated experience will show exactly how many characters a path exceeds the limit and will provide a guided flow to rename or move affected items so they can sync successfully.

This improvement addresses a common OneDrive sync issue by reducing user confusion, minimizing workflow disruption, and helping users resolve errors faster.

This update is associated with Microsoft 365 Roadmap ID 557563.

[Rollout schedule]

General Availability (Worldwide): Beginning by mid-September 2026 (previously mid-August) and expected to complete by mid-October 2026 (previously mid-September)

[Impact on your organization]

Who is affected

All users of the OneDrive sync client on Windows desktop

Platforms and services

OneDrive for Business (Windows desktop sync client)

What will happen

Max path errors are one of the most commonly reported issues by OneDrive sync users. Currently, when a file or folder path exceeds the 520-character sync limit, the error message only states how many characters the path exceeds the limit and asks users to shorten it. In addition, File Explorer limitations may prevent users from renaming paths over 260 characters, and the sync client may stop syncing until the issue is resolved.

As part of this improved error experience, when users encounter max path errors, the sync client will continue running and users will be guided through a custom rename and move experience.

With this update:

The sync client will continue running when users encounter max path errors
Users will be guided through a custom rename and move experience to resolve issues directly

The rename experience will:

Show the number of over-limit characters
Highlight which items in the path can be renamed
Allow renames even when the path exceeds 260 characters

Screenshot - Custom rename dialog

The move experience will:

Show over-limit character counts in a guided interface
Display warning dialogs for over-limit shared items in OneDrive
Display warning dialogs for over-limit items in shortcuts

Screenshot - Example warning dialog for overlimit items in shortcuts

These enhancements are designed to reduce troubleshooting time and improve the overall sync experience.

[Action required and recommendations]

No admin action is required. This update will be automatically available through the OneDrive sync client.

You may want to:

Inform your helpdesk and support teams about the improved error messages, as this update should reduce max-path-related support tickets.
Update internal documentation for resolving OneDrive sync issues if applicable.

Learn more

[Compliance considerations]

No compliance considerations identified. This update does not change how customer data is stored, processed, or accessed.

Raw JSON (for debugging)

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      "Summary": "OneDrive for Business on Windows will improve sync error messages for paths exceeding 520 characters, guiding users to rename or move files without stopping sync. This update, rolling out mid-September to mid-October 2026, requires no admin action and aims to reduce support tickets and user confusion."
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