Windows license OEM VS OEM_DM and VLA

[Microsoft Windows]

Hi Team,I wanted to understand the difference between OEM and OEM_DM license type. As per our understanding OEM_DM license is digital marker but its still OEM license. For OEM licenses, product id registry key contains OEM as last three digits. But we have noticed for OEM_DM license the product id key does not contain OEM. How can we differentiate between OEM_DM vs VLA from productid key? Is there any other way to find out the license type from the registry key values without actually going into the windows image.

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