Topic Last Modified: 2011-05-16

You can provide communications services to users in your organization in any of the following ways:

If you deploy Lync Server 2010 in your organization, you can federate with the domains of one or more Microsoft Lync Online 2010 customers, including for any customer you set up for your organization and customers set up by other organizations. To enable federation between users of your on-premises Lync Server 2010 deployment and users of a Lync Online 2010 customer, you must configure support for the domain and users of the Lync Online customer. For details about Lync Online 2010, see Lync Online at

In This Section