Hi. This does sound like a REALLY stupid question and something I never thought I would have to ask but how do you update an existing exchange 2007 install to SP1? The only SP1 files I can find seem to be a completely fresh install and I cannot find any documentation regarding this anywhere... Is that how it should be? Do I just go through as if I was doing a fresh install? Also I have noticed a couple of threads on there commenting on problems during the update, are there loads of problems? Is it worth updating? Its just I cannot risk any disruption of emails etc... Thanks