Topic Last Modified: 2011-05-11

In this documentation, we use the term external user to refer to a user who signs in to your Microsoft Lync Server 2010 deployment from outside the firewall. External users that you can authorize to use Microsoft Lync Server 2010 communications software to communicate with internal users (that is, users who sign in to Lync Server 2010 from inside the firewall) can include the following:

Your edge deployment authenticates these types of external users and controls external access for the following types of communication:

In order to control communications across the firewall, you can configure one or more policies that define how users inside and outside your firewall communicate with each other. You can also configure settings and apply policies for individual internal users or for specific types of external users to control communications with external users.