You do not need to risk downloading unverified third-party .cab files from untrusted repositories online. The exact file is already available inside official Microsoft resources. Method A: Extracting from the Windows Server 2012 R2 ISO
Once you have placed the .cab file or the sxs folder onto the local machine (for example, at C:\sxs\ ), use one of the following deployment methods. Option A: Installation via PowerShell (Fastest) You do not need to risk downloading unverified third-party
When you attempt to enable this feature on an isolated, hardened, or offline server, Windows cannot reach Windows Update to fetch the payload. This results in an installation failure. To bypass this, you must explicitly point the deployment tool to the file located in the installation media. How to Get the NetFx3 OnDemand Package CAB File Option A: Installation via PowerShell (Fastest) When you