Windows Server 2008 R2 Datacenter: Which License Key to Use for Guest VMs?

I wanted to share the following customer Q&A in case you run into this yourself. Q: I own Windows Server 2008 R2 Datacenter Edition for each physical processor in my Hyper-V host, which provides unlimited guest virtual machine (VM) rights. What license key do I use to activate the individual guest VM if we aren’t…

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