https://learn.microsoft.com/en-us/windows/release-health/windows-message-center#3206
Windows Server 2012/R2: Extended Security Updates
You can now get three additional years of Extended Security Updates (ESUs) if you need more time to upgrade and modernize your Windows Server 2012, Windows Server R2, or Windows Embedded Server 2012 R2 on Azure. This also applies to Azure Stack HCI, Azure Stach Hub, and other Azure products. A new article provides details and step-by-step instructions to extending limited protection for up to three consecutive 12-month increments. Read it at Windows Server 2012/R2: Extended Security Updates. ESU online and proxy activation scenarios are covered in Extended Security Updates (ESUs): Online or proxy activation.
