is a legitimate Microsoft utility, not a standalone program to "download" for features. It is the Office Software Protection Platform Rearm tool, which comes pre-installed with Microsoft Office to manage volume licensing and trial periods . 📝 Review: What It Is & What It Does

But here’s the truth: It’s a built-in Microsoft tool. Downloading it from a third-party source is one of the fastest ways to infect your PC with malware.

You should see a message saying "Microsoft Office rearm successful". Microsoft Learn