I just got called out yesterday to install a 2003 server for a company that is switching from Macs to PCs running WinXP Pro but the owner is keeping his G5 since its the only one that wasn't an old iMac. Anyway, I've created AD user accounts, joined the XPPro's to the domain, and everyone can log on no problem. The G5 can see the server and when he clicks on it, it asks for a username and password. The problem is that it keeps rejecting the logon. Error 5000 I believe which he Googled and found that its an authentication failure. I know Windows NT/2K/2K3 has services for Mac but I thought that OSX didn't need that. Is there something I need to do on the server so the G5 can connect to SMB shares?