Windows cached password question

Hi all. I have a Windows 7 laptop that's a member of a Windows domain. The person using this laptop can obviously log into it with his domain credentials (domainname\username and then his domain account password) when he's connected to the network or not. What I'm wondering is if there's a time limit set on how long that password will be cached locally. This laptop may not connect directly to our network for 6 months or more. What I'm worried about is if one day in a few weeks he'll attempt to log into the laptop with his domain credentials and be told he can't because he's not connected to the domain. Any idea on how long that password is cached for?

If it is a domain logon, the password is changed on the domain and the password rules are domain rules. If he is not connected to the domain, Windows won't know if it is expired or not, so he should have no problem.

You can always test what happens on a test system. Set the domain user account password to expire in the near future, then disconnect the system from the network. If the user can still logon while disconnected after the domain password expires, then you have your answer.