I'm required at work to use a Mobile Account connected to Active Directory. I also have an Administrator account on my computer (which is a local account).
Whenever I need to use sudo commands from the terminal, logged in as Mobile Account, the password of the Admin account is never recognized.
All the other operations that need a password input (e.g. the authorization to install Applications) work, so I can't explain why inside the terminal it doesn't work.
I've solved it by putting my user in the list of sudoers.