|Oh, don't tell them the silly stuff you did, just say you don't know what happened, It just broke. |
It is possible that you actually change the system from a domain to a workstation. If so then you'd need to try to change it back. Sometimes you really will need to have domain access to return it.
You don't want to reset password either in this case. It might make things worse.
Lastly is the how it needs to authenticate with the domain. If you lost stored credentials, well, you need your it people to fix it.
Why did it take me over a year to phone in a problem to ATT?