[mirimir]

I doubt that I'd even try to pull VMs out of a full-system backup without restoring it first. Over my head, for sure.

I've used VBoxManage to create, manage and control VMs on remote headless hosts. And work with VRDC desktops. Easy.

Backup/restore of host system should have nothing to do with VirtualBox. It's just files. But then, I use Debian hosts. For backups, I tend to use LUKS-encrypted SSDs via USB, and just copt the full VM folder. Works perfectly.