Create another recipient policy for each of those domains. Teh arrange
the MX records to have mail delivered to the server's "A" record.
What makes you think that everyone runs Exchange or uses Microsoft
If the Exchange server is to manage the mailboxes then there must be a
user record in the AD.
The AD domain and the DNS domain are different things. Then can be the
same, but they don't have to be.
Go ahead. It'll work.
"Corresponding domains"? You'll create a user record in the AD and
assign a mailbox. Hopefully you'll have the LDAP filter on the
recipient policy set to examine a property in the user record that
will allow it to distinguish users that should be assigned one domain
address from users that should be assigned another domain address.
Although you can manage this manually, it's a pain because you'll have
to make sure that each user's addresses are NOT automatically
generated by the RUS. If you fail to do that, and later have to
rebuild te RUS, the primary addresses assigned to the users will not
be the ones you want them to be.
MCSE+I, Exchange MVP
MS Exchange FAQ at http://www.yqcomputer.com/