That tip that came from Office Communicator Team and is about Conferencing Add-in for Outlook 2007. We all should have this tool in your “Collaboration Installation” package.
You can use the Conferencing Add-In for Microsoft® Office Outlook® to schedule Microsoft® Office Communicator 2007 R2 conference calls or Microsoft® Office Live Meeting Web conferences. Schedule Live Meeting Web conferences when you need to show slides, share an application or your desktop, or collaborate on a whiteboard. For instructions about installing the Conferencing Add-In for Microsoft Outlook, contact your system administrator.
Read more at source: http://communicatorteam.com/archive/2009/04/02/571.aspx