Synology Active Backup for Business for Hyper-V VM List Blank

初次使用 Synology Active Backup for Business 的時候
Hyper-V Server 連線成功，但 VM 列表一片空白

用 Support Center App 產生 Active Backup for Business 的 Debug Log 後
在 dsm\var\log\synoscgi.log 找到以下錯誤訊息

NAS synoscgi_SYNO.ActiveBackup.Inventory_1_list_node[24340]:
[ERROR] main.cpp:212(24340,139646703461952)
Code: [0]
What: [[24340]hypervisor_agent/hyperv_agent.cpp:145
{"error_class":"PowerShellException","error_message":"std_out: b'[ //VM Information JSON// ]',
std_err:
Get-VM : Hyper-V encountered an error trying to access an object on computer 'HYPER-V-xxxxxx' because the object was 
not found. The object might have been deleted, or you might not have permission to perform the task. Verify that the 
Virtual Machine Management service on the computer is running. If the service is running, try to perform the task 
again by using Run as Administrator.
At line:3 char:1
+ Get-VM| Select Id,Name,MemoryStartup,ProcessorCount,State,Status,Prim ...
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (:) [Get-VM], VirtualizationException
    + FullyQualifiedErrorId : ObjectNotFound,Microsoft.HyperV.PowerShell.Commands.GetVM
 
Get-VM : Hyper-V encountered an error trying to access an object on computer 'HYPER-V-xxxxxx' because the object was 
not found. The object might have been deleted, or you might not have permission to perform the task. Verify that the 
Virtual Machine Management service on the computer is running. If the service is running, try to perform the task 
again by using Run as Administrator.
At line:3 char:1
+ Get-VM| Select Id,Name,MemoryStartup,ProcessorCount,State,Status,Prim ...
+ ~~~~~~
    + CategoryInfo          : ObjectNotFound: (:) [Get-VM], VirtualizationException
    + FullyQualifiedErrorId : ObjectNotFound,Microsoft.HyperV.PowerShell.Commands.GetVM, status_code: 1",
	"error_params":{"error_id":""},"success":false}]

到 Hyper-V Host 執行上述紅字指令產生相關錯誤

經檢查為奇怪的舊版本 VM Guest Configuration 檔案 (.xml) 殘留在以下路徑中導致

C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines
C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines Cache

刪除後恢復正常
Active Backup for Business 中可以正常顯示 VM Guest 清單