Add each internal SIP domain used in your organization to the list of domains authorized to connect to the Edge Servers. The list should not include any external domains or domains of federated partners.

If you add a new internal SIP domain and you want partners to be able to federate with the new domain, you typically need to obtain a new certificate for the external interface of the Access Edge service. For details about requesting and assigning a certificate for the external interface, see “Set Up Certificates for the External Interface” in the Deployment documentation in the Office Communications Server 2007 R2 TechNet Library at .

To specify a supported SIP domain

  1. On the Edge Server, open Computer Management.

  2. In the console tree, expand Services and Applications, right-click Office Communications Server 2007 R2, and then click Properties.

  3. Click the Internaltab.

  4. Under Domains, click Add Domain.

  5. In the Add SIP Domaindialog box, type the FQDN of the internal SIP domain.