I was really hoping to avoid having to recreate the directory associations but I went ahead and did it and can confirm it fixed the problem. Fortunately we didn't have too many groups to re-associate. At this point I'm just glad the day ended on a win. Thank you for the quick responses!
I can login as local admin and test connection to AD successfully, but when I go to actually login with AD credentials, the login just hangs forever. So much for "AD enhancements". Edit: Also just noticed that once the login hangs once, I can't login as local admin anymore either. I have to restart the entire appliance before it works again.
AD Authentication Broken in 3.2