2- Install and Configure Lync Server 2010 - Prerequisites
The prerequisites based upon Windows 2008 R2 SP1 OS.
Install RSAT, IIS And Silverlight.
This is the 2ed video out of five:
1- Lync 2010 -Active Directory Certificate Services
2- Installing Lync Server 2010 Prerequisite
3- Install and Configure Lync Server 2010 Part 1
4- Install and Configure Lync Server 2010 Part2
5- Install and Configure Lync Server 2010 Part 3