I don't recommend to install your CRM test environment on the same AD, this
is not a safe way to test the application. I recommend to set up a separated
test environment (using Microsoft Virtual Server) on a different AD, then
"copy" the production CRM deplyoment to the test environment. You have to use
Redeployment Wizard to convert the databases.
MCSE+S, MCT, Microsoft Dynamics Certified Master