I have had numerous customers that have been asking me about going from eval product to full version activated software.
Well this is for you, read on ….
Most evaluation versions can be converted to full retail versions, but the method varies slightly depending on the edition. Before you attempt to convert the version, verify that your server is actually running an evaluation version. To do this, do either of the following:
If you have already activated Windows, the Desktop shows the time remaining in the evaluation period.
If the server is running a retail version instead of an evaluation version, see the “Upgrading previous licensed versions” section of this document for instructions to upgrade to Windows Server 2012.
For Windows Server 2012 Essentials: You can convert to the full retail version by entering a retail, volume license, or OEM key in the command slmgr.vbs.
If the server is running an evaluation version of Windows Server 2012 Standard or Windows Server 2012 Datacenter, you can convert it to a retail version as follows:
For the evaluation version of Windows Server 2012 Standard, you can also convert to the retail version of Windows Server 2012 Datacenter in one step using this same command and the appropriate product key.
For more information about Dism.exe, see http://go.microsoft.com/fwlink/?LinkId=192466.
Upgrading previous retail versions of Windows Server to Windows Server 2012
The table below briefly summarizes which already licensed (that is, not evaluation) Windows operating systems can be upgraded to which editions of Windows Server 2012.
Note the following general guidelines for supported paths: