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Hi all, I just completed a server upgrade project last night. We moved one of our SQL servers from Server 2008 with SQL 2008 on old hardware, to Server 2012 R2 with SQL 2012 on newer hardware by doing a fresh installation of everything.
We own a license key for Server 2012 R2 Datacenter, but I installed Standard. Apparently I forgot to add the license key when I was installing the OS, so I'm trying to add the key today with the server up and running, but I'm getting an error that says 'That key can't be used to activate this edition of Windows. Please try a different key' I should be able to install Standard using a Datacenter key, but not the other way around, correct?
Any way to fix this? Are you using OEM, retail, or Volume Licensing? If you're using VL then you should be using a KMS server. As for the others you should have downgrade rights so I would think your key should work. I would just go ahead and follow Gerry's instructions and run dism to get it to Datacenter. No point in limiting yourself by using Standard instead of Datacenter anyways.
All of my servers have been running 2008 R2 STD, but I have Datacenter licensing. It is a super quick fix and not difficult to do. Now instead of being limited to 32GB of RAM on my production SQL server I get to bump it up to 64-72.