I have been searching but unable to find this answer. Possibly I am asking it wrong.
We will be using an Openfire server with PSIChat as the primary desktop client ( for some reason Spark will not work within our network configuration ) . External users will be able to choose other clients as the see fit.
What I need to do is when a conversation is started a standard legal disclaimer is send both clients.
Example being from Skype
"Lync/Skype communications with 3rd parties must comply with the
Information Management Standards and Manual. Instant Messaging must not be used
to exchange Confidential information, or to create Records or formal agreements
with 3rd parties. "