To configure VPIM on the Microsoft Exchange Server 2007:
Click Start > Exchange Management Console > Microsoft Exchange > Hub Transport.
In the Actions section, click New Send Connector.
In the Name field, enter a descriptive name for the email connector and then click Next.
On the Address Space screen, click Add.
In the SMTP Address field, enter the fully qualified domain name (FQDN) of the host.
In the SMTP Address field, enter the fully qualified domain name (FQDN) as follows:
For NuPoint Standard, enter the FQDN of the host
For NuPoint UM 640, enter the FQDN of the cluster and both nodes in the format servername.domain.com, and then click OK.
Click Next.
On the Network Settings screen, select Route mail through the following smart host:
Click Add and then enter the IP Address of the host.
Click OK and then click Next.
On the Configure Smart Host Authentication screen, click Next. Ensure that the local server is highlighted and then click Next again. A configuration summary is displayed.
Click New. A completion notice is displayed. Click Finish.