Our system wasn't quite as critical, thankfully, but the app owners failing to respond to "Hey, by the way, your service account for your data base is gonna be closed" is just gross negligence. My condolences that you had to take the brunt of their scrambling to cover their asses.

For all the complaints I may have about certain processes and keeping certain stakeholders in the loop about changing the SQL Views they depend on, at least I acknowledge that plenty of people did heed the announcement and make the switch. It's just that the "Oops, that mail must have drowned in my pile of IDGAF what our sysadmins are writing about again. Can't you just give me the new password again, pretty please?" are far more visible.