• Download and install Microsoft Virtual Machine Converter 3.0
• Start Windows PowerShell as administrator
• Import the converter’s PowerShell module: 

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

• Convert vmdk disk to vhdx:

  ConvertTo-MvmcVirtualHardDisk -SourceLiteralPath "D:\SOURCE_PATH\VMware_Disk.vmdk" -DestinationLiteralPath "D:\DESTINATION_PATH\Hyper-V_Disk.vhdx" -VhdType DynamicHardDisk -VhdFormat vhdx

Must be run on Windows 6.2 (Windows 8 / Server 2012) or later OS.

May 2017
Windows 10 Pro