Lync Server 2010 edge server network configuration issue

Symptoms

When the Lync Server 2010 edge server is not configured with two network interfaces or both the network interfaces are not configured with IP addresses from different subnets. Some or all of the following functionality listed below might not work as expected. 
  • External User Access
  • Public IM connectivity
  • Federation communication
  • Push notification for Lync 2010 mobility client

Cause

Incorrectly configured Lync Server 2010 edge server network interfaces


Resolution

The Lync Server 2010 edge server should have two network interfaces that are configured with IP addresses from different subnets.

For more information on setting network interfaces for Lync Server 2010 edge server role, please refer the following document Microsoft TechNet document:

Set Up Network Interfaces for Edge Servers

Note: The Lync server 2010 edge server role is a multi-homed computer with external and internal facing interfaces. The internal and external subnets must not be routable to each other.

More Information

For more details on Lync Server 2010 Edge server hardware and software requiements see the following Microsoft TechNet document:

Hardware and Software Requirements for Edge Components
Properties

Article ID: 2757916 - Last Review: Sep 18, 2012 - Revision: 1

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