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Adding new domains and users

We just registered a new domain name for another business unit. We will soon be adding users for that business unit to our Exchange server. How can I set this up?

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You will need to create a new Recipient Policy for that domain. Recipient Policies tell Exchange that it should receive email for a particular namespace (domain), and instruct it to generate email addresses. When you create the Recipient Policy, you can define which users get an email address for the new domain. The Recipient Policy GUI has a simple way to define this. Behind the scenes it is creating an LDAP filter based on the parameters you specify in the GUI. If you are comfortable with LDAP and creating LDAP filters, you can directly enter the filter by choosing Customize > Custom Filter > Advanced in the properties of your new Recipient Policy.

Once this is done, the second part is making sure the external DNS zone for your new domain, let's call it newdomain.com -- is being hosted on an Internet-accessible DNS server. You can locate it on the same DNS server as your current domain. Many registrars now provide DNS hosting as part of the registration fee or for a very nominal additional fee.

In the external DNS zone for newdomain.com, you should insert an MX record that points to the A record of your Exchange server. (This can be the A record in your current domain's zone).

This was first published in July 2006

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