|I disagree with phil22, there is no such thing as "Windows Server 2008 R2" without a designation of edition. See this site for details: http://www.microsoft.com/en-us/serv...|
Additionally, there are volume licensing copies of this software that may not work with keys from other sources, so even if you have a key for standard, and you have standard installed, you may still not be able to use the key because it was installed with volume media.
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