I've been running into a problem recently that my AD account keeps getting locked out. The lock is coming from three different computers, but so far, only those three - as indicated by event ID 4740 on our AD controller. The lock out is occurring several times per day, but I haven't been able to identify a pattern.
These are computers that I rarely work with, and haven't touched any of them for at least a year (before investigating this issue) - one of them I've never worked on. Also, all three aren't used much at all in daily use.
Event ID 14 on the suspect machines state that the password stored in credential manager is invalid. That said, I have checked logged in both as local admin and myself and there are NO credentials stored in the Credential Manager. Further, on all three machines, I have removed my local account from the registry - and I am still getting locked out.
So what is my next step? This is driving me crazy.