I have a conectivity problem that has me stumped. Please advise if I should post in another more relevant forum as well. I have 3 users connecting to SBS 2003 with their client desktop machines. Those machines work just fine. Each office has only one Ethernet connection and the users frequently disconnect from their desktop PC's and plug the ethernet cable into the adapter on their laptops. Unfortunately, this no longer seems to work for internet connectivity. The SBS server is providing DNS and DHCP. The laptops pick up a new IP address no problem, but cannot resolve externally. I can ping the server from the laptops and when I run Ipconfig /all, the settings are all identical to what I see if I run the same command when the desktop machines are on the ethernet cable, with the exception of a new IP address for the client. Here's the kicker, if I plug in my personal laptop (brought in just for t-shooting), I can get out on the internet just fine. The 3 client laptops also are able to get on the internet if they are taken to an external location. They can VPN in from home. I tried running ipconfig /release, /renew/, /flushdns, and /registerdns on the laptops, still no way to get out. Any ideas?

If they're able to connect and function on the LAN but get no resolution on the internet this sounds like a DNS problem. When you're checking the ipconfig /all settings, is the DNS address on the laptops the same as the DNS address that appears on the PC and/or your laptop?

Yes, they all show that they are looking at the IP address of the SBS for primary DNS.