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Mac OS 26.7 and M365 Office Applications- upload block errors only on Office applications.
Mac OS 26.7 and M365 Office Applications- upload block errors only on Office applications. When making changes to an Office document like Excel &/or Word using M365 E5 license since September 19th, ...
This is the limitation that OneDrive for Business supports up to 300,000 synced items per device, regardless of storage capacity. A new update announced in Sep 2026 will raise the macOS limit to 1 million items (Public Preview mid‑October 2026, GA later).
https://pupuweb.com/mc1477187-onedrive-sync-supports-up-to-1-million-items-on-macos/