I quit a domain of my company. After rebooting my computer, it only shows the account for that domain, and I cannot login. I can't switch to administrator or other users.
I tried the method on Locked out of Windows 10: login no longer shows Administrator, but only an account that I never used. But my laptop was encrypted with BitLocker and I forget the recovery passwords and keys (also I can't retrieve any recovery keys for my Microsoft account). I can't access my drive at all.
I tried everything, but haven't had any luck. How can I login to my system with a local account? Thanks!

Computer Nameand changed toMembers of WorkGroup. Our IT department have no clue to solve the problem. – lll9p Jan 14 '22 at 08:35