I can understand the point that Word is needed for producing some borked, glitched, eldritch formatting that 99% of people expect as correct because Office is that much widespread and has trained people to be Wrong on the Internet; and in that case yeah I would still recommend running a(n older version of!) Office just so that you can process (and test) that you are producing what is expected in the exchange.

It’s curious actually. While LO compatibility has improved, I don’t think anything close to an umbrella “Imitate Word [$VERSION] Breakages” option has ever been added or even considered for LO? How about the other Word imitators? Can eg.: WPS or Calligra replicate Microslop idosyncracies? Because if so, running those would be better than running Office on a remote.