Such a notificaiton is available with the IM Logging & Archiving feature in Messenger - http://www.webex.com/webexconnect/orgadmin/help/cs_IM_Archiving.htm
Dean,Connect IM support federation with OCS/Lync via the OCS/Lync XMPP Gateway (http://www.webex.com/webexconnect/orgadmin/help/17169.htm). On the Connect IM side, nothing much is required except for publishing the XMPP SRV records in DNS - http://ww...
Aside from publishing the client XMPP service records in DNS, there is a setting in Connect Org Admin tool that needs to be enabled before a 3rd party XMPP client can be used. This is docmented here - http://www.webex.com/webexconnect/orgadmin/help/1...