Convert/Clone VHDX to VHD

Virtualbox cannot run VHDX file currently. So we have to convert them to VHD or VDI.
Here is a command to convert/clone from VHDX to VHD

VBoxManage.exe clonehd "PATH_TO_YOUR_FILE.VHDX" --format VHD "PATH_TO_CONVERTED_FILE.vhd"

Sample command:

C:\Program Files\Oracle\VirtualBox>VBoxManage.exe clonehd c:\MyData\VM\VBox\TOCR3CU9\StandardCU9.vhdx --format VHD c:\MyData\VM\VBox\TOCR3CU9\StandardCU9.vhd