Modern versions of Office are typically linked directly to a Microsoft Account , removing the need for a 25-digit product key.
The only safe URL for downloading any old version of Office is via the Microsoft Account download portal (login required) or via the official setup.office.com . There is no Bitly link. There is no text file.
If you already own a license, you can reactivate by signing in with your Microsoft Account or using the Microsoft Activation Wizard to activate by phone.