Microsoftwindowsnetfx3ondemandpackagecab Fixed Download Server 2012 R2 New -

: Prevents DISM from attempting to contact Windows Update. 2. PowerShell

dism /online /enable-feature /featurename:NetFX3 /All /Source:D:\sources\sxs /LimitAccess Use code with caution. Note: Replace D: with your actual CD/DVD drive letter .

I can provide the exact scripts or registry fixes tailored to your network configuration. Share public link

When a legacy application (such as Microsoft SQL Server 2012) demands .NET 3.5, the OS natively attempts to download the required components via Windows Update. However, this automation fails if the server: : Prevents DISM from attempting to contact Windows Update

This guide is intended for system administrators. Always test installations in a non-production environment first. Windows Server 2012 R2 is no longer under extended support; consider upgrading to a supported OS version where possible.

Installing .NET Framework 3.5 on Windows Server 2012 R2 is a common requirement for running older enterprise applications. However, this installation frequently fails with error codes like 0x800F0906 or 0x800F081F because the source files are not included in the default OS installation.

In domain environments, a Group Policy often forces the server to use a WSUS server for all updates, including features. Since WSUS doesn't store .NET 3.5 files, the installation fails. Note: Replace D: with your actual CD/DVD 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.

I can give you a tailored workaround to clear the error quickly. Share public link

Windows Server 2012 R2 introduces a minimal footprint philosophy. Features like .NET Framework 3.5 (which includes .NET 2.0 and 3.0) are in a "Removed" state rather than just "Disabled". However, this automation fails if the server: This

Is isolated from the internet for strict security compliance.

If your organization has a volume licensing agreement, VLSC is the gold standard.

This means the source files could not be found. Re-check your /source path, ensuring it points to sources\sxs .