Microsoft has release a document that will help you transition from Live meeting To Microsoft Lync.

Resources included in this download package are designed to support your organization’s Live Meeting Service to Lync (Server or Online) transition planning. This download will be updated with additional resources as available, including, but not limited to, transition planning workbook, communication templates, change management guidance, job aids and detailed FAQs.

Download Details - Microsoft Download Center - Live Meeting-To-Lync Transition Resources