Microsoft Office Communicator 2005 doesn’t have automatic client chat logging facility. But it is possible if u can click on save as email during the chat session. But during this time, u may forget to save.
Another way, u can use Instant Archive Viewer for LCS/OCS. For IAV, please link <a href=”http://www.instant-tech.com/Archive_Viewer_OCS.cfm”>Here</a>
Also u may try to activate a logging feature of Outlook 2007, so that Communicator writes a chat-log into an Outlook folder. Thus you can view your chat log in Outlook.
U can use “<i>MOC Client Logger</i>” a small tool, that fulfills ur purpose. Just download and after install u can do what u want ! This link is <a href=”http://www.kellerinc.net/”>Here</a>
Please update me on further proceed.