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Lync Server 2010 edge server network configuration issue

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
Incorrectly configured Lync Server 2010 edge server network interfaces

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
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 2757916 - Last Review: 09/18/2012 19:24:00 - Revision: 2.0

  • Microsoft Lync Server 2010 Standard Edition
  • Microsoft Lync Server 2010 Enterprise Edition
  • kbsurveynew KB2757916