Microsoftwindowsnetfx3ondemandpackagecab Download Server 2012 R2 New |work| Today

After installation, verify success:

Enable .

D:\sources\sxs\ (assuming D: is your mounted ISO drive). 2. Installation via Command Line (Recommended)

: Insert or mount the Windows Server 2012 R2 installation media (e.g., to drive Add Roles and Features Server Manager Add Roles and Features Select Feature : Proceed to the page and check .NET Framework 3.5 Features Specify Source Path Confirmation page, click the warning link: "Specify an alternate source path" : Enter the path to the folder where the file resides: D:\sources\sxs Method 2: Using PowerShell (Recommended) After installation, verify success: Enable

Run the following command in an elevated Command Prompt. Replace D: with your actual mounted drive letter:

Ensure you are using a source path that exactly matches your operating system's version, edition, and language. A mismatched ISO from a different language or cumulative update level will cause this error. Also, ensure you are using the /LimitAccess flag in your DISM command.

Verify that your -Source or /Source string matches your drive letter exactly. Installation via Command Line (Recommended) : Insert or

While some third-party sites offer direct downloads of the .cab file, the most reliable and secure method is to extract it from official Microsoft media. Install Net Framework 3.5 SP1 Offline on Server 2012 R2

✅ This method works if the CAB is in a folder named exactly as the source path – no file rename needed.

If you do not have the original OS ISO readily available, log into the Microsoft Volume Licensing Service Center or your visual studio subscription portal. Download the multi-language media package to extract the identical .cab file. Step-by-Step Installation Methods Also, ensure you are using the /LimitAccess flag

DISM.exe /Online /Enable-Feature /FeatureName:NetFX3 /All /Source:C:\NetFx3 /LimitAccess Use code with caution. Copied to clipboard /Source : Points to the folder containing the .cab file.

The files are likely already available to the user on the original installation media.

reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v UseWUServer /t REG_DWORD /d 0 /f net stop wuauserv net start wuauserv

Locate the file named microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab .

Do not download the .cab file. Mount the Server 2012 R2 ISO and use the /Source switch in DISM to point to the sources\sxs directory. This is the intended "new" architecture for feature installation in this operating system version.