We have exchange 2010 with one domain "mycompany.com" We are doing a joint venture project for a long period of time and set up a new domain for these couple companies and us. Let's call it "myjointventure.com" I set up the DNS for myjointventure.com to come to me . I want to have employees and non-employees have the myjointventure.com email address and the employees would keep their "mycompany.com" address. The non-employees obviously have their own email address too, "theiremail.com" What is the best way to allow these non-employees to have an email address on my exchange server but yet provide the maximum security for my network AND let them have functionality and do their job??
Should I move the domain to google apps? I'd rather not pay them $6 per month per mailbox. Thanks experts!