If you want, I can provide exact step-by-step commands for your environment (local path, network share, or Group Policy), or generate a Group Policy template and a script to deploy across multiple servers.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. If you want, I can provide exact step-by-step
dism /online /enable-feature /featurename:NetFx3 /all /source:C:\NetFx3 /LimitAccess Use code with caution. If you share with third parties, their policies apply
When you try to enable this feature, Windows attempts to download the component payload from Windows Update. If your server is disconnected from the internet, sits behind a restrictive firewall, or uses a Windows Server Update Services (WSUS) server that does not host these files, the installation will fail. To fix this, you must provide the specific .cab deployment package. How to Get the NetFx3 CAB File for Server 2012 R2 To fix this
If you have another running Windows Server 2012 R2 machine that already has .NET 3.5 installed, you can copy the file from its WinSxS side-by-side store repository located at C:\Windows\WinSxS\ . Method 3: Downloading from Official Microsoft Repositories