The Microsoft Lync Server 2010, Planning Tool provides prescriptive guidance to get you started with planning your topology.
The Microsoft Lync Server 2010, Planning Tool asks you a series of questions about your organization and the features that you are interested in. The planning tool will then use your answers to recommend a topology based on the tested Microsoft Lync Server 2010 user model. Your organization may have a different user model. If so, you should adjust the recommended topology as necessary to fit your organization’s needs. What’s New in the Planning Tool for Lync Server 2010?
Download at http://www.microsoft.com/downloads/en/details.aspx?FamilyID=bcd64040-40c4-4714-9e68-c649785cc43a