We have set up a virtual network seperate from our production network. It contains all four of our DC's and our Exchange 2003 Server and one XP desktop workstation. We added a Windows 2008 Standard box and installed Exchange 2010. The users on the Exchange 2003 server can send email back and forth. But a new user on the Exchange 2010 server can only send email, they do not receive any of the email sent to them. Help? Thank you!