Makes sense and thank you for explaining and improving the article! Apologies for jumping to conclusions. It might be worth adding a tidbit directly to the article on why Exchange couldn’t be updated and how it was irrelevant to the “solid” infrastructure (I.e. something like “while Exchange was sorely out of date due to the hassle and cost of upgrading, the underlying infrastructure of the in-house servers it ran on was solid”), but defer to you and other folks here. If I’m the only who was bothered by that then the fault is mine!