I'm trying to add a #########.ca version of our main #########.org domain. I added the .ca domain to Accepted Domains, and manually entered the .ca version of my own email address to test. It worked fine. My problem is with the e-mail address policy. I created a new policy and applied it. The wizard completed the task with no error, but none of the mailboxes have the new .ca version of their email address listed except mine which was manually entered. What am I doing wrong?

you need to goto exchange management console > organization configuration > hub transport > and then right click on the policy you created and click apply.Dishan M. Francis, Senior Technology Consultant

I tried that, but it didn't work. Then I noticed the priority value. I set the priority to 1, then applied. Now all is right with the world! Thanks Dishan!