The official way to obtain the file is through the Windows Assessment and Deployment Kit (ADK) download page on Microsoft Learn. This specific MSI is a component of the ADK used for offline help and documentation. Understanding the Documentation MSI
: Choose a local folder. The installer will download all components, including the Installers subfolder where the .msi and .cab files are stored. adk toolkit documentationx86enusmsi download link
The toolkit documentation-x86_en-us.msi (or sometimes Toolkit20Documentation-x86_en-us.msi ) is a small installer package—typically around 300KiB—that contains the logic and data required to install offline help files for the ADK. It is commonly used by IT professionals for reference in air-gapped or low-connectivity environments where online documentation is unavailable. How to Download the Documentation File The official way to obtain the file is