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vSphere 6.5 requirements and limitations

To protect hosted VMs in vCenter 6.5 or ESXi 6.5 environments, these additional requirements and limitations apply:

To protect vSphere 6.5 environments, the Unitrends appliance must be a 64-bit appliance running release 9.1.1 or higher.
ESXi 6.5 is supported on 64-bit Unitrends appliances only. If you are using a 32-bit Unitrends appliance, you cannot protect or recover VMs hosted on ESXi 6.5. Do not upgrade any ESX servers to version 6.5 that you are protecting with a 32-bit appliance.
If a vCenter 6.5 VM migrates to a different vCenter, that VM is no longer protected on the original Unitrends schedule. You must manually add it to a new schedule to resume protection.
The vCenter must not be configured to use the Server High Availability feature. High Availability is not supported.
Hosted VMs must not be configured to use VM encryption. The VM encryption feature is not supported.