I host three different websites in my office, each with different domains. eg. abc.com, def.com xyz.com. My internal active directory and dns is abc.com. I have exchange 2010 on a server and outlook 2010 on the clients. Exchange is receiving emails as *.abc.com. I want to setup ad,dns,exchange, outlook so I can send and receive email to and from each domain, email@example.com, firstname.lastname@example.org, info@xyz but all displayed and accessible from my same login. I want each domain data files to be in its own file and accessable by more than one user. I'd appreciate some guidance on how to set this up.