Step 4. Select Mount Mode
At the Mount Mode step of the wizard, select the VM disk option to register virtual disks on VM added to an ESXi host.
If you want to register virtual disks on a cluster as FCDs, select the First class disk (FCD) option. In this case, Veeam Backup & Replication will perform the instant disks recovery as it is documented in the Performing Instant First Class Disk (FCD) Recovery section.