Converting hype-V VMs failing with "permission to perform this operation was denied"

Products

• VMware vCenter Server

Issue/Introduction

You are trying to convert Hyper-V VMs using VMware Converter
You can see all targeted VMs listed but as soon as you try conversion you get message

permission to perform this operation was denied

Converter logs are not giving conclusive error.

Environment

VMware Converter 6.x

Cause

Missing execute permissions for the user that is initiating conversion.

 

Resolution

Give execute permission to the user to access ROOT\VIRTUALIZATION\V2

1. Make sure UAC is disabled, and no antivirus in the machine.
2. Include local user that you are using in "Hyper-V Administrators" group 
3. Explicitly grant the Hyper-V Administrators group the execute permission in WMI Control. 

For Granting WMI "Execute" Permissions:
1. Opened wmimgmt.msc (WMI Control) as a Full Administrator. 
2. Right click on WMI Control > Properties > Security tab
3. Navigate to Root > virtualization > v2 > Security  
4. In Security, select “Hyper-V Administrators” group and give Read-Write-Execute Permissions.
5. Restart Converter worker service and try converting the machine again.

 

Registry Edit is needed as well

Set LocalAccountTokenFilterPolicy value to 1 in HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System