I am a consultant who works on-site at many different client offices doing .NET coding and SQL administration. I have my own Active Directory domain structure in place, and my clients have their own. When I am at the client's office, using my business laptop (which is a computer on my domain, running Windows Vista Ultimate SP1), I am not able to use Windows Authentication for file shares, TFS, and SQL Server. For file shares and TFS, I am prompted to log in as a domain user, but for SQL, I have to use a SQL login. However, when I am at my office, and I VPN to their network (RRAS), I am now impersonating my (client) domain login. I am able to access all resources as though I am that user, without being prompted, which makes life much easier.
My question is this: Is there a way to configure either my laptop or their network to allow me to impersonate my (client) domain login when I am physically on their network, just like when I am VPN'd in?