Fix OneDrive sync problems on a Mac - Microsoft Support
https://support.microsoft.com/en-us/office/fix-onedrive-sync-problems-on-a-mac-af3012d7-13ec-4ac9-bbb1-ebcd2a0cd756
WEBOneDrive for Mac. We're sorry that you're having trouble syncing your OneDrive. To help get you syncing again, follow the steps below to unlink and re-link your computer to OneDrive. Notes: If you exceed your Microsoft storage, you won’t be able to upload, edit, or sync new files (such as Camera Roll) to your OneDrive. Learn more.
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