By default, Windows Server 2012 R2 is configured to contact Windows Server Update Services (WSUS) or Microsoft Update. However, many secure environments block external updates. Others face a catch-22: you need .NET 3.5 to install the very management tools that would normally fetch .NET 3.5. The CAB file allows .
$cabPath = "C:\Deployment\microsoft-windows-netfx3-ondemand-package.cab" if (Test-Path $cabPath) Write-Host "Installing .NET Framework 3.5 from CAB..." dism /online /add-package /packagepath:$cabPath /quiet /norestart Write-Host "Installation completed. Reboot may be required." else Write-Error "CAB file not found at $cabPath" By default, Windows Server 2012 R2 is configured
You do not strictly need to download a .cab file manually. The easiest way is to point the server to the source files inside the ISO. The CAB file allows
file, you typically need to point the installer to the original installation media. This package is required because the files are not installed by default to save disk space (a feature known as "Features on Demand"). Installation Overview The easiest way is to point the server
DISM.exe /online /enable-feature /featurename:NetFX3 /All /Source:C:\dotnet35 /LimitAccess Use code with caution. Copied to clipboard /LimitAccess flag is critical; it tells Windows
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