NPM - ActiveDirectory Module Authentication

I am using activedirectory module from npmjs in one of my node application to authenticate against Active Directory, My question Is- Is it required to send plain string password while authenticating with AD? I mean if ad stores the user password it must be encrypting it in someway or other, can we send a encrypted password for authentications? Here is what I mean -

ad.authenticate(username, password, function(err, auth) { 
// instead of plain password can it be encrypted password?
 if (err) {
    console.log('ERROR: '+JSON.stringify(err));
    return;
  }

  if (auth) {
    console.log('Authenticated!');
  }
  else {
    console.log('Authentication failed!');
  }
})

via Jeet