Yeah, I have a sliding scale for business grammar and the whole "never end with a preposition" is really a low priority. It's the "don't wear white shoes after Labor Day" of grammar IMO. And correcting that one usually makes it sound like the writer is from another country, or stodgy or something. It is a grammar rule with which I will oft take exception Besides, there are more important things to watch out for in business writing, like overuse of jargon (or "mitigated speech" or whatever you want to call it), and just plain not getting the message across clearly. People who manage aren't always the best writers. Maybe they have other things to do. Depends on the situation. That's why companies hire copy editors and such people who can dedicate their time to it.