In the long arc of software stewardship, Microsoft finds itself caught in a paradox of its own ingenuity: the AI tools it built to make Exchange Server safer are now the very reason a major update cannot ship. The Exchange team, still carrying the institutional memory of high-profile breaches exploited by suspected state actors, has chosen vigilance over velocity — folding each newly discovered vulnerability into an ever-shifting release target. It is a quiet reminder that the pursuit of security is not a destination but a continuous reckoning, and that the tools we create to protect us can al