Topic Last Modified: 2011-05-16

To enable Microsoft Lync 2010 users in your organization to communicate with users of a Microsoft Lync Online 2010 customer, you must have completed the following steps:

After completing all of these steps, verify communications by testing communications between an internal user in your organization and a user of the Lync Online customer. If communication is not successful, use Lync Server 2010 Logging Tool from your Edge Server to capture log and trace files to troubleshoot the problem. For details about using the Logging Tool, see Open Lync Server Administrative Tools in the Operations documentation. For details about the Logging Tool, see the Lync Server 2010 Logging Tool documentation on the TechNet Library at