Hi
You can change the cahedlogonsCount in registry to 0 this will mean everytime they try to log on the domain must be available. You can follow this link:
http://support.microsoft.com/kb/172931
but before you create the changes make sure this is the best option because issues might occur when it comes to changing passwords from the laptop, or when trying to log on when the domain is unavailable because you might need to do so maybe in the event
that something needs to be done on the machine urgently but you had taken outside of the domain. So think about it and if you are sure this is okay and you have an admin password for the local machine then check it out and try it out
Hope this helps you :)
tech-nique