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If you are looking to "download" , it is important to know that you shouldn't have to download it from a third-party website. This script is a built-in tool included with Microsoft Office installations to manage volume licensing and activation.
You typically do not need to download because it is a local script included by default with Microsoft Office installations. It is used to manage volume activation, check license status, and install or remove product keys via the command line. Microsoft Learn Where to find it