You want to create a recipient policy for your organization to control generation of email addresses for Exchange recipients, Mailbox Manager settings, or set Exchange to accept mail for a new SMTP domain.
Open the Exchange System Manager (Exchange System Manager.msc).
Select the Recipients node.
Right-click the Recipient Policies node and select New→ Recipient Policy . . . .
At the New Policy dialog box, place a check in the Email Addresses and/or Mailbox Manager Settings checkbox. These checkboxes will indicate whether you wish to be able to specify that mailbox policies, email addresses, or both are controlled by this recipient policy. Click OK
On the General tab of the recipient policy dialog box, enter a name for the recipient policy. Click the Modify button to select which Exchange recipients you wish to fall under the influence of this recipient policy.
Use the LDAP query builder to select the attributes of a mailbox object or select a mailbox store or server. Click Find Now to ensure that your LDAP query locates the desired group of mailboxes.
On the Email Addresses (Policy) tab, create or edit an email address policy template (using the dialog shown in Figure 5-6). This template will be applied to all Exchange recipients who fall under this recipient policy.
If you wish to apply Mailbox Manager settings with the same recipient policy, select the Mailbox Manager Settings tab and follow the instructions ...