The specific file required for this installation is microsoft-windows-netfx3-ondemand-package.cab , which is part of the "Features on Demand" payload. Where to Find the .cab Package
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Is the server from the internet, or managed via WSUS/SCCM ? The specific file required for this installation is
Because Windows Server 2012 R2 optimizes its storage footprint, it utilizes an On-Demand installation model. If your server lacks a direct, unrestricted connection to public servers—or if it relies on a local Windows Server Update Services (WSUS) server that does not host Features on Demand payloads—the OS cannot find the file. Manually pointing your installation wizard or deployment script to this explicit .cab archive solves the lookup mismatch. Where to Securely Download the File
You should always acquire the deployment files from verified, secure sources to maintain server integrity. If you share with third parties, their policies apply
In this blog post, we discussed the .NET Framework 3.0 On-Demand Package CAB download for Windows Server 2012 R2. We covered the different methods to download and install the package, including using the Microsoft Update Catalog, PowerShell, and Server Manager.
To install .NET Framework 3.5 on , you typically need the microsoft-windows-netfx3-ondemand-package.cab file found on the original installation media. This file is not available as a direct standalone download from Microsoft; it is part of the "Payload" (Side-by-Side) folder on the OS disk. How to Obtain and Use the .cab File Is the server from the internet, or managed via WSUS/SCCM
This article provides a definitive guide to locating, downloading, validating, and deploying the package.