You can import VMs, templates and snapshots that have previously been exported and stored locally in XVA format (with a .xva file extension) or XVA version 1 format (ova.xml and associated files) using the XenCenter Import wizard.
Click Next to continue.
The import progress is displayed on the status bar at the bottom of the XenCenter window and also on the Events view under Notifications.
The import process may take some time, depending on the size of the imported VM's virtual disks, the available network bandwidth, and the disk interface speed of the XenCenter host. When the newly imported VM is available, it appears in the Resources pane.