I believe you are referring to Microsoft Office 365, previously known as Microsoft Office 2019 or Microsoft Office 2016, but more likely Microsoft Office 365 (also called Microsoft 365) or just generally referring to Microsoft Office.
Today, "94fbr" is more of a historical curiosity in software piracy lore than a practical method for getting free Office. microsoft office 94fbr
Mobile Apps: The Microsoft Office mobile app is generally free to use on smartphones and tablets for basic editing and viewing. I believe you are referring to Microsoft Office
: Users often search for this alongside "Microsoft Office" to find text-based activators (like microsoft office 94fbr