We have a main office windows 2003 domain, and kerio firewall, vpn server. We also have little branch office with 5 users, which are connected with kerio vpn clients to company's network resources. when they access file server (network shares) for the first time they input their domain passwords and tick remember password check box, and supplying password is not required for the next times. but one of the computers, Windows 7 ultimate, forgets password very soon and requires re-authentification (about every 2 hours) even if user has not rebooted or logged off. The user is working with finance app via vpn, so it is very big problem for him. i tried to clear windows vault in credentials manager, manually adding network credentials, but still the same problem, after a couple hours re-entering the password is required.