I have successfully created, and mounted a shared windows folder to my Proxmox VE host, but it will not allow me to store VHDs there. I have no real intention of running them from there, but did want to see if it was possible. Now that I have a separate bare metal TrueNAS Scale server, the need to store even my ISO files there is gone, so I guess this one isn't solved, so much as sidestepped.