If you have a Windows PC that is joined to an Active Directory but hasn’t been part of the network after a password change the PC may require an old password or you may not know the old password to log in. As you are connecting via a VPN
To force a sync on the client:
- Login in with another account on the client PC or use an old password if it works
- Connect via VPN
- Open Command Prompt
- Type
runas /user:<DOMAIN>\<USERNAME> cmd
- Enter the new password
- Close both Command Prompts
This will force a sync with the Active Directory, allowing you to then log in with the new password. If running this process from another account you may be asked to log out and log back in the first time you use the new password as it syncs this new passwords across the local profile.