Notes from the field: upgrading Exchange 2007 to SP1http://msmvps.com/blogs/ehlo/archive/2008/01/31/1489106.aspxSo far, I did a couple of clean Exchange Server 2007 SP1 installations and they went really, really smoothly. I can say that the setup experience is much better than the RTM version. Meanwhile, I also had the chance to upgrade existing Exchange ServerenCommunityServer 2008.5 SP2 (Build: 40407.4157)