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)" Source="Microsoft.Web.Administration" ErrorCode=-2147020584
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