EFS encryption for OneDrive folders

Hi,

in our organization we have EFS encryption policy to encrypt all files and folders in Desktop and Documents.

We are going to activate OneDrive For Business backup (know folders synchronization) but EFS seems to not encrypt local files on the Desktop (everything ok for Documents).

I try to force the policy to encrypt the folder %useprofile%\Desktop and %userprofile%\Onedrive...\Desktop but nothing changes.

Could anyone help with this?

Thank you