You cannot install Lync Server 2010 in an environment that has a FTP site in IIS


Assume that you install the FTP role service on a computer and create a FTP site. You try to deploy Microsoft Lync Server 2010 on the computer. In this situation, the setup process fails. Additionally, you receive the following error message:
System.Runtime.InteropServices.COMException was unhandled
  Message="The object identifier does not represent a valid object. (Exception from HRESULT: 0x800710D8)"


 This issue occurs because the Lync Server 2010 setup process does not expect FTP site in the Internet Information Services (IIS).


To resolve this issue, install the following cumulative update:
2514981 Description of the cumulative update for Lync Server 2010, Core Components: November 2011


Article ID: 2637103 - Last Review: Nov 19, 2011 - Revision: 1

Microsoft Lync Server 2010 Standard Edition, Microsoft Lync Server 2010 Enterprise Edition