New Server 2012 R2 install over Server 2008 R2 SP1 OEM?

Can I  do an in-place install of Windows Server 2012 R2 Std OPEN license over Windows Server 2008 R2 Enterprise SP1 - OEM and keep settings etc.? I have 2 x VM's running on the host.
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Mark GalvinManaging Director / Principal ConsultantCommented:
Lee W, MVPTechnology and Business Process AdvisorCommented:
Yes you can.  However, I wouldn't.  Why do you want to complicate an installation with muck from an older version?  Most professionals would advise AGAINST in-place upgrades.  Instead, perform a clean install.  Keeps a pristine OS.
murphygeAuthor Commented:
Thanks guys. I have seen the technet article and I agree about a clean install being better. However the main point of my question was about the licensing, especially the OEM bit. Can I do an in-place install with OPEN license media overt an OEM installation?

Lee W, MVPTechnology and Business Process AdvisorCommented:
As stated, yes.

OEM copies cannot be used as upgrades but can be upgraded.
VL copies don't require OEM copies on the hardware (for SERVERS; for Workstations, the workstation must come with a Pro class license).
Retail copies (not marked as upgrade) can be used to upgrade or clean install.

If your main point was about licensing:
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