The administrator thing is not good. You can just add them to the terminal service group? That is allot of instances of outlook running on one server. Did you actually look under task manager and under processes to see the amount of ram etc. that each user is using? The 350 G5 doesn't seem like it would be made to handle that. Another thing is... If you go to folder options, then go under view, and make sure the Automatically search for network folders and printers is unchecked. I had a problem with another network that i was responsible for... And it made things run horrible. (it is a setting on the client machine)