in 4.3 I can:

- Storage -> Domains -> Select Domain -> Disks -> Select Disk -> Download

and this will download the disk image to my client, that then I can upload to a different environment

- Storage -> Disks -> Select Disk -> Export

But then, even if I have an export domain active I get this kind of window that I don't understand....

Perhaps it means another DC managed by the same Engine is needed?

How can I export a virtual disk from an engine environment to another engine environment?

Yes, I can artificially create a VM and attach the disk to it and then export the VM, but is there a functionality to directly export a disk to an export domain?

Thanks,

Gianluca