Windows Server 2012, and its Windows Server 2012 R2 update, with both reaching the end of their lifecycles on October 10, 2023. Microsoft's lifecycle support page states: After this date ...

This vulnerability affects older Windows versions like Windows Server 2012 R2 and Windows 8.1, which Microsoft no longer ...

ESUs are automatically provided to Azure Arc-enabled servers and non-Azure servers connected to Azure Arc. ESUs can be enrolled at scale using Azure Policy or the Azure portal with no upfront charge.