- Login to laptop using cached, old password.
- Connect via VPN.
- Open Command Prompt
- Type ‘runas /user:<DOMAIN>\<USERNAME> cmd’
- Enter new password.
- Close both Command Prompts.
- Wait a few minutes. Shortly after, you should get the notification area pop-up with the set of keys icon with notice “Windows Needs Your Current Credentials
Please lock this computer, then unlock it using your most recent password or smart card”. - Locked the computer.
- Unlock with new password.
- Done.
https://social.technet.microsoft.com/Forums/en-US/f85e761f-8958-4024-b823-30d3df8a1384/active-directory-account-password-sync-over-vpn-possible-?forum=w7itpronetworking
