How many previous logons were there to cache registry key?
When you decide to login to Windows by using cached logon information, the domain controller has to be available to validate your account. Otherwise, you cannot access network resources that require domain validation. Your only hope is to access network resources that do not require domain validation. Not too many people know that through the registry and a resource kit utility, you can change the number of previous logon attempts that a server will cache. There are generally between 0 to 50 logons. For example, a value of 0 turns off logon caching and any value above 50 will only cache 50 logon attempts.