We have a production Web Server that is currently connecting to our SQL Server which is obviously in the same domain. We have setup a SQL Server for our customers that want their own SQL Environment outside of our domain in which we have created for their use. We have one application that we want all of our users to use that we only want to host via our production web server. The problem is, our production web server is in a different domain that the other SQL Servers that we specifically setup for our customers that wanted their own environment. What is the best approach to allowing our Production Web Server to access both our SQL Servers that are in different domains.