Enable this group policy to choose folders to sync in the background.
Only folders under user's home folder can be synced. Precede the folder with ~/ to specify the location of the synced folder in the user's home folder. For example, to sync the user's Documents folder, enter ~/Documents.
This policy is for syncing user's data. Do not sync ~/Library, ~/Documents/Microsoft User Data, or any of their sub-folders in the background, as they cannot be synced correctly.
Once enabled, this group policy takes effect when users log out and back in.