Hi,

I am working on Lync Edge Server from couple of weeks but unfortunately, I can't federate with Skype and other partners. First of all I want to mention following things:

1. Lync 2013 Front-End Server is fully functional for Internal Users

2. Lync 2013 Reverse Proxy is fully functional for Mobile Users

3. Lync 2013 Edge Server is fully functional for External Users except Federation.

Let me share Edge Server current configuration with you.

1. Lync Edge Pool have two NICs, Internal (Private IP) and External (3 Public IPs with default gateway and External DNS)

2. Host File have entries for Lync front-end server

3. Local CA certificate for Internal Interface and Starfield CA Certificate for External interface with required SAN e.g., acs.domain.com etc

4. Skype is searching my domain URIs but added contact is showing offline in skype

5. Lync 2013 Basic client is showing Presence Unknown for Skype contacts (Skype contacts already merged with Live ID)

6. Test-CSFederatedPartner cmdlet is also giving 504 error while testing from Front-end server.

This is production environment actually so please let me know if I am missing something.

Verify that you configure SRV Record on External DNS {SRV Record _sipfederationtls._tcp.<domain> on port 5061 and SRV Record _sip._tls.<domain> on port 443}

Also Verify that you enable lync federation on Lync topology and publish it

1. On a Front End server, open Topology Builder. Expand Edge pools, then right click your Edge server or Edge server pool. Select Edit properties.

2. In Edit Properties under General, select Enable federation for this Edge pool (Port 5061). Click OK.

3. Click Action, select Topology, select Publish. When prompted on Publish the topology, click Next. When the Publish is finished, click Finish.

4. On the Edge server, open the Lync Server Deployment wizard. Click Install or Update Lync Server System, then click Setup or Remove Lync Server Components. Click Run Again.

5. At Setup Lync Server components, click Next. The summary screen will show actions as they are executed. Once the deployment is done, click View Log to view available log files. Click Finish to complete the deployment.

For configuration of lync federation, you can check blow link

http://technet.microsoft.com/en-us/library/jj204800.aspx

Have you submitted a request to provision your SIP domain for public IM connectivity through https://pic.lync.com/