Microsoft just released the Lync 2013 version of the Planning Tool. This is a great tool to help you get started planning your Lync 2013 deployment. The tool can be downloaded from:
In this post, we walkthrough how to download, install, and then use the Lync 2013 Planning Tool.
The steps to install, download, and use are documented in this document: Lync 2013 Planning Tool Guide