u/KurobinaYuki2

I have a problem that keeps coming back at semi-long intervals where the older of my two Outlook accounts (never happened with the other one) spits out a "Command Error 12" when I open Thunderbird, deletes its entire message cache and redownloads it from scratch. Eventually I just delete the account and re-add it, which seems to fix it, but after a few weeks it happens again. And now in its latest iteration it won't even display any folders besides the inbox. And I should add, both accounts have the same server and port settings.

I'm running Thunderbird 140.9.1esr on Windows 11. What should I do?