Rapid Recovery can protect shared virtual hard disks in the VHDX format on a Hyper-V host by using agentless protection.

NOTE: Rapid Recovery does not support protection of shared VHD sets.

A shared VHDX is a virtual hard disk on a Hyper-V host that is shared among a cluster of guests. When the   Agent is installed on the Hyper-V host for agentless — or host-based — protection,   protects the shared VHDXs at the host level.   can also protect a shared VHDX at the guest level when the Agent is installed on the guest.

When you select and protect the virtual machines (VMs) available on the host,   protects all virtual hard disks associated with those VMs, including any shared VHDXs. After protection is complete, you can edit the protection schedule and remove or protect shared VHDXs at the host level under Volumes on the Summary page for the host. All recovery points of these shared virtual hard disks are displayed on the Recovery Points tab for the host, not for the individual VMs.

When using agentless protection,   automatically detects new VHDXs and offers the option to protect them. Unprotected disks are displayed in a separate Shared Disks section. Metadata is not gathered for these disks until after they are protected.

On the Summary page for a guest virtual machine, shared VHDXs are listed under Shared Volumes. A clickable icon next to the volume name opens a dialog that displays the VMs that are connected to that disk. If a connected VM is not protected, then the option to protect that VM is available.