A family of Microsoft word processing software products for creating web, email, and print documents.
Actually, the Mathematics Add-in works perfectly well in Office 2016. The problem is that the installer in the package doesn't recognize Office 2016 as a valid target. If you have an earlier, supported version of Office installed along with Office 2016, the add-in will appear in both versions. I haven't tried it, but I suspect that a trial version of 2013 would suffice, and you could then uninstall the trial.