Windows

See your network administrator and make sure you are authorized to log in through dial-up, ensure your domain name is correct, and last but not least make sure the "office" end of the VPN is set to receive you.

Good Luck

Try this: bring the laptop to work, have it join the domain there, then take it home and try to log on.

You might check with your admin and when you are dialed in, have the admin add you workstation through the server manager.

Just a guess here. If your computer at home can dial in with VPN, but can't find your domain to add itself to, maybe you need a DNS number from within your office. Your computer could be using the DNS from your ISP, which wouldn't have a listing for your domain.

Good Luck!

Check with your network administrator to ensure yu still belong to the domain. If so they may need to recreate your machines profile inside the domain you are after. This should give you access to your domain.