Convert virtual machines and disks from VMware hosts to Hyper-V hosts and Windows Azure or convert computers and disks to Hyper-V hosts.

Avec PowerShell :

Import-Module 'C:\Program Files\Microsoft Virtual Machine Converter\MvmcCmdlet.psd1'

Get-Command -module mvmccmdlet

ConvertTo-MvmcVirtualHardDisk -SourceLiteralPath "S:\Templates\Win2012DC.vmdk" -DestinationLiteralPath "C:\ClusterStorage\VMs\Temp" -VhdType DynamicHardDisk -VhdFormat Vhdx
#If offline can disable the tools. If was online could uninstall from the source VM Uninstall-MvmcSourceVMTools
Disable-MvmcSourceVMTools -DestinationLiteralPath "C:\ClusterStorage\VMs\Temp\Win2012DC.vhdx"

Via http://windowsitpro.com/hyper-v/convert-vmdk-vhd