To create the Hyper-V database backup set, in client application, you should run the Backup set wizard by clicking on New backup set button in My backup sets tab.
In the Backup set wizard mark Advanced copy and select Hyper-V from dropdown list, then define the backup set name.
Xopero will automatically connect with the Hyper-V server and list existing virtual machines. In the Virtual machines filed you need to choose machines that will be added to the backup set. By clicking the All you will add all of the machines to current backup set.
Next, you have to define in which status the machine must be when the backup process starts in the field Virtual machines statuses. If the VM’s status is different than defined, it will not be backed up.