Local OneDrive folder always returns to "Read-Only" (Not a reparse point (error 4390)

[GaryEglinton]

A new problem has developed. I have spent two days fighting it, including all day chatting with Microsoft Support. With no warning, my local OneDrive folder has become labeled "Read-Only." It cannot be defeated, no matter how deeply I go into permissions, etc. It always goes back to "Read-Only." The result is that my GoodSync, which used to work perfectly cannot access the local Outlook folder to complete synch to an external drive, as it used to do until recent days. GoodSync reports "-> target-unknown: DeviceIoControl: The file or directory is not a reparse point. (error 4390)" The

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