Windows Server 2008 R2 Enterprise Activation Key

These keys are purchased off-the-shelf (physically or digitally). They are typically valid for a single installation. While they are transferable (you can move the license to a new server if the old one is decommissioned), they are increasingly rare for an OS as old as 2008 R2.

Support for up to 16-node failover clusters and advanced memory management. windows server 2008 r2 enterprise activation key

However, if migration is impossible in the short term, Microsoft offered for up to three years past the end-of-life date. This windows server 2008 r2 enterprise activation key