I just found out we will be moving to a new location in June, and I would like to incorporate an Exchange upgrade as well....Right now we are running Exchange 2000 Standard Edition, which I am constantly battling to keep under 16GB.....Running in a small W2k environment with 4 other servers, currently 30 users, growing to app. 60 by next year. Should I just go to 2000 Enterprise, or would it be wiser to take the leap all the way to Exchange 2003 Enterprise? Is it a fairly easy upgrade either way? Are there any issues running 2003 in a 2000 mixed-mode environment? Any thoughts or suggestions are much appreciated. Thanks.