In this office, most of us are using Outlook 2007, while a few of us uses Outlook 2010. For Outlook 2007, we are able to view other people's free busy information after hacking the registry of HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Options\Calendar and enter a new DWORD value data called 'UseLegacyFB' and set the value as 1. Once we do that, we are able to view people's free/busy information. I don't know what to do with the Outlook 2010, since hacking the registry and updating windows did not work. Help? :(