OneDrive: Sync Support for up to 1 million items on Windows

OneDrive Sync supports syncing up to 1 million items on Windows devices, helping teams manage large document libraries and shared content at scale without compromising access across devices. This preview requires the Insiders ring and that devices meet minimum hardware and configuration requirements. Devices that don’t meet these requirements continue to sync at the existing 300,000-item supported limit with no disruption. Product OneDrive Release phase Preview Release date December CY2026Preview date: April CY2026 Platform Desktop Cloud Instance Worldwide (Standard Multi-Tenant), GCC, GCC High, DoD Created 2026-04-22 23:30:25Z Roadmap ID 560549 Roadmap Link https://www.microsoft.com/microsoft-365/roadmap?id=560549

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