Ok so our company has two separate domains one for the US and one for MX. The first is mydomain.com and the second is mydomain_mx.com. Our primary domain is mydomain.com and I have various users that need mydomain_mx.com along with the mydomain.com. I have setup the separate domain in exchange 2010 as per these links
http://technet.microsoft.com/en-us/library/aa996314(v=exchg.141).aspx
I then wanted to setup the various users to accept that second emailbox. The problem is that they want the email to go to a separate emailbox inside of outlook. so inside of outlook they would havebsmith@mydomain.com and bsmith@mydomain_mx.com. how does one make two user accounts with bsmith@mydomain.com and bsmith@mydomain_mx.com work? I can't use the bsmith alias twice as a user account in AD. What is the best way to handle this. Thanks.