We have a contractor who cannot access our companyweb SharePoint site...page cannot be displayed. He is connected locally on our network. His laptop is setup with DCHP, but it is in his company domain not ours. He can access our application server and file shares without any problems using an account on our domain. He is the first and only user we have with this setup.
I included untrusted domain in the title after reading about setting up domain trusts. This is not an option.
Our SBS 2008 implementation is straight out of the box vanilla.
Would this be a problem with IE, DNS, IIS, other?