And in the newest edition the converse option "Precompose Unicode", when Word once again decides that there shouldn't be any national characters and produces composed sequences that won't render in the browser with custom fonts. (It's pretty much as essential as "Zap Gremlins" had been – and about as god-sent, especially for work in multi-lingual context.)
Word likes precomposed Unicode characters. Decomposed characters will make the spell check go wild. macOS, on the other hand, loves decomposed characters, and will insert them in places where you don’t want them.