
Hi there,
It is recommended that you upgrade to the latest available build before you deploy to decrease deployment issues. Known Folder Move doesn't work for users syncing OneDrive files in SharePoint Server.
- Use a migration tool such as Mover or the SharePoint Migration Tool to copy contents in the network file share location to a user's OneDrive, making sure that all contents go into the existing Documents, Pictures, or Desktop folders.
- Disable the Window Folder Redirection Group Policy and make sure to leave the folder and contents on the network file share.
- Enable KFM Group Policy. Known folders move to OneDrive and will merge with the existing Desktop, Documents, and Pictures folders which contain all the file share content that you moved in the first step.
Redirect and move Windows known folders to OneDrive https:// learn.microsoft.com/en-us/onedrive/redirect-known-folders
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