Recovery Points For NTFS Volumes of Hyper-V Agentless Protected VMs Are Not Accessible When Mounted (4042281)

Some volumes are inaccessible when mounting a recovery point from a Hyper-V agentless protected virtual machine.  The error "The volume does not contain a recognized file system" appears.

Note: The volume is accessible on the original virtual machine and "chkdsk" completes without errors.

This has been reproduced with the following configuration:

• Agentless protected Hyper-V virtual machine (Guest) with OS: Windows Server 2019 Datacenter
• The virtual machine was protected with Rapid Recovery Core server with OS: Windows Server 2016 Datacenter

This happens in scenarios when it is not possible to create volumes with a 512,1024, and 2048 cluster size on a virtual machine running on Hyper-V potentially due to a recent Microsoft Windows update.

The affected recovery points would be accessible on a Rapid Recovery Core Server with an OS "Windows Server 2019 Datacenter" instead of "Windows Server 2016 Datacenter."