Hello, here at my job they recently started using Office Communicator for internal chat. I have a PC at my desk, but am fortunate enough to be able to use my powerbook for 90% of my workload, unfortunately, I have to keep switching to the PC if I need to chat with someone. I have the newest MSN Messenger 5.0 with that corporate login deal, but I've never been able to get it to sign in. I've heard we have the 'Live Communications Server' but I can't for the life of me sign in. Anyone been successful with the Corporate Login on Messenger 5.0?