Instead of searching online, look into your system's directory. The file path depends on your installed version of Microsoft Office and your Windows architecture (32-bit or 64-bit). Standard File Locations For Microsoft Office 2016 / 2019 / 2021 / 365:
For Office 2016, 2019, or LTSC 2021 (64‑bit): Download BEST Ospprearm.exe
Download BEST Ospprearm.exe: A Complete Guide to Office Licensing Tool Instead of searching online, look into your system's