onedrive OneDrive sync app limit increasing to 1 million files

[itskdog]

Just saw this message on my M365 message centre: https://admin.cloud.microsoft/?ref=MessageCenter/:/messages/MC1294528

 

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Introduction

OneDrive sync on Windows will support syncing up to 1 million items per sync instance per device. This increase is intended to help organizations with large OneDrive and SharePoint libraries sync more content reliably across devices. The capability is planned to be available first in Public Preview (requires the Insiders ring) and later in General Availability.

Devices that do not meet the minimum hardware and configuration requirements will continue to sync at the existing 300,000-item supported limit without disruption.

When this will happen

• Public Preview: We will begin rolling out in late April 2026 and expect to complete by late April 2026.

How this affects your organization

Who is affected

• Users syncing OneDrive (consumer), OneDrive for Business or SharePoint document libraries on Windows
• Users with libraries that approach or exceed the current 300,000-item supported sync limit
• Preview participants using the Insiders ring

What will happen

• Eligible Windows devices can sync up to 1 million items per sync instance.
• Devices that do not meet the requirements remain supported up to 300,000 items with no change in behavior.
• No disruption is expected for existing sync setups.

Note: Performance is not yet optimized for syncing a high volume of read‑only files or for accounts under legal hold. Microsoft is actively working to improve performance and reliability for these scenarios.

What you can do to prepare

No action is required if you do not plan to use Public Preview.

If you plan to evaluate or prepare for this capability:

• Identify devices and users likely to benefit from syncing very large libraries.
• Ensure devices meet the minimum requirements (supported OS, memory, storage, and processor).
• Verify the recommended ideal state configuration for OneDrive and SharePoint sync reliability.
• Inform helpdesk staff and impacted users that Public Preview requires the Insiders ring and that ineligible devices will remain at the current limit.

 

Requirements are as follows: 

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• Latest OneDrive sync client with the latest OneDrive Insider programme enabled.
• Platform: Windows 11 or Windows Server 2022 with public preview for Windows.
• Memory: 16 GB RAM minimum (32 GB recommended).
• Storage: Solid-state drive (SSD) required.
• Processor: Intel i5 / AMD Ryzen 5 or later, Snapdragon X Plus.
• Recommended sync app configuration.

 

(Most notable parts on the sync app config that people might not have in place, is enabling KFM, syncing SharePoint only through shortcuts, and setting up OneDrive sync reports on config.office.com)

 

Looks good, will apply to most of our devices, just not the DfE laptops from COVID and some older devices that are still on 8GB RAM. I do wonder if this also makes for a faster sync time, or if it will take even longer to sync 1,000,000 files if you have them.

[RobFuller]

Finally!!