I love the fact that IM's can be sent to any distribution lists in the GAL. However I think its necessary to be able to have some form of restrictive controls in place. We currently use the "message restrictions" section to limit who is able to send messages to "all staff" and other large distribution lists. I did some testing to see if it would also control who can initiate IM sessions to those lists. Unfortunately it doesnt have any effect. My question is this, is there another way to control what users are able to send to a particular distribution list?