If your Surface has lost connection to the domain and the password is not working, you can try the following options:
- Local Account: If you have a local account on the Surface, try logging in with that username and password.
- Safe Mode: Boot into Safe Mode and try logging in. Sometimes this can bypass certain login issues.
- Network Connection: Reconnect the Surface to the network where the domain controller is accessible and try logging in again.
- Password Reset Disk: If you have a password reset disk, use it to reset the password.
If none of these options work, you may need to contact your IT department for further assistance.