I am running the following command on Windows Server 2008R2
C:\Windows\system32>dism /online /set-edition:serverdatacenter /productkey:xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
I get the following error:
Deployment Image Servicing and Management tool
Version: 6.1.7600.16385
Image Version: 6.1.7600.16385
Error: 1605
The specified product key is not valid for the target edition.
Run this command again with a product key specific to the target edition.
The DISM log file can be found at C:\Windows\Logs\DISM\dism.log
The most telling lines in the dism.log are
2012-06-25 13:44:58, Error DISM DISM Transmog Provider: PID=2824 Product key is keyed to [], but user requested transmog to [serverdatacenter] - CTransmogManager::ValidateTransmogrify
I called Microsoft licensing and they told me they verified the product key, and there is nothing else I can do unless I want to pay for server support.