If you have an or Visual Studio subscription (legacy), the “Windows Server 2012 R2 (x64) – DVD (Rok)” image is still available under “Product Keys” → “Other Products”.
After a successful fix, do not connect to Windows Update immediately. Windows Server 2012 R2 Foundation Rok Iso Download Fix
He downloaded the standard directly from the Microsoft Evaluation Center—the only trusted source left. He used a deployment tool to mount the image. If you have an or Visual Studio subscription
Because the ROK is OEM-locked, you generally need an ISO from your specific hardware vendor. Here is the vendor-by-vendor breakdown. Windows Server 2012 R2 Foundation Rok Iso Download Fix