Microsoft-windows-netfx3-ondemand-package.cab -extra Page

The mystery of the " -Extra " identifier is worth exploring, as this package often requires companion files for a successful installation in some Windows environments.

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs : Target the running operating system. /Enable-Feature /FeatureName:NetFx3 : The specific request for .NET 3.5. /LimitAccess : A strict instruction— do not try to call home to Windows Update : The map to the file’s lair. The Long Wait

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /Source:X:\sources\sxs /LimitAccess Microsoft-windows-netfx3-ondemand-package.cab -Extra

Often, the above command fails if Windows tries to check Windows Update first. Use this stricter version:

You must run the command console with elevated administrator rights. The mystery of the " -Extra " identifier

If you want, I can:

When administrators need , an -Extra step might include: /LimitAccess : A strict instruction— do not try

I can provide a tailored deployment script or debug the specific installation failure. Share public link