Hi, dowloaded Messenger 5.0, happily using my Powerbook at work now amidst a sea of Dells and XP. At work, we use Windows Messenger for inner office chatting, connecting via an SIP Communications server. I can't find or figure how to connect to that with Messenger 5.0. Is it possible? What version will allow me to? Can I do it via Adium, and if so, how? Basically, what do I need to use to connect to the Office Network for chatting. THANKS!