When a VM is recovered in instant restore, it will read directly from Backup Data, and at the same time write any new changes to a delta disk. In order to make the instant restored VM a permanent production VM, customer would need to schedule a time (less intensive IOPs period), to finalize the disk and merge 2 into 1.
Currently Finalization can be easily done when restored to ESXi Platform, and VM will be running while Finalization occur. However, when restored to Hyper-V, customer will need to perform manual steps and shut down VM during Finalization step.
The steps required are described here https://forum.acronis.com/forum/125402#comment-388735
Based on latest update from Acronis Product Team, automated Hyper-V Finalization will only be available towards end of 2017.