Topic Last Modified: 2011-04-05

This procedure details the steps to configure the Lync Server 2010 pool to use the Lync Server 2010 Mediation Server, instead of the legacy Office Communications Server 2007 R2 Mediation Server.

To successfully publish, enable, or disable a topology when adding or removing a server role, you should be logged in as a user who is a member of the RTCUniversalServerAdmins and Domain Admins groups. It is also possible to delegate the proper administrator rights and permissions for adding server roles. For details, see Delegate Setup Permissions in the Standard Edition server or Enterprise Edition server Deployment documentation. For other configuration changes, only membership in the RTCUniversalServerAdmins group is required.

For the latest information on finding qualified PSTN gateways, IP-PBXs, and SIP trunking services that work with Lync Server 2010, see "Microsoft Unified Communications Open Interoperability Program" at
Configure Mediation Server Using Topology Builder
  1. Log on to the computer with an account that is a member of the RTCUniversalServerAdmins group or has the equivalent administrator rights and permissions.

  2. Start Topology Builder: Click Start, click All Programs, click Microsoft Lync Server 2010, and then click Lync Server Topology Builder.

  3. Select the option to Download topology from existing deployment, and then click OK.

  4. In the Save Topology As dialog box, select the Topology Builder file you want to use, and then click Save.

  5. In the left pane, navigate to PSTN gateways.

  6. Right-click PSTN gateways, and then click New IP/PSTN Gateway.

  7. Complete the Define New IP/PSTN Gateway page with the following information:

    • Enter the gateway FQDN or IP address. The FQDN of the gateway is required if the gateway uses the TLS protocol.

    • Accept the default value of the Listening port for IP/PSTN gateway or enter the new listening port if it was modified.

    • Set the Sip Transport Protocol.

  8. In the left pane, navigate to the Enterprise Edition Front End pool or the Standard Edition Server.

  9. Right-click the pool, and then click Edit Properties.

  10. Under Mediation Server, set the Listening ports.

  11. Next, associate the newly created PSTN gateway by selecting it and clicking Add.

  12. Associate the PSTN gateway to the Lync Server 2010 Mediation Server by selecting it and clicking Make Default.

  13. In Topology Builder, select the top-most node Lync Server 2010.

  14. From the Actions pane, select Publish Topology and then click Next.

  15. When the Publishing wizard completes, click Finish to close the wizard.

It is important that you complete the next topic, Change Voice Routes to use the new Lync Server 2010 Mediation Server to ensure that the voice routes are pointing to the correct Mediation Server.