We currently run Exchange 2003 Enterprise and are considering upgrading to Exchange 2007. Will I need to upgrade to 2007 Enterprise as well or can I upgrade to 2007 Standard? If we go to 2007 Standard, what, if any, functionality will we lose?Thanks for the help.Grog

Hi, Basically take a look here: This is a comparison between enterprise and standard 2007. http://www.microsoft.com/exchange/evaluation/editions.mspx Bear in mind, you cannot "upgrade" from Exchange 2003 to Exchange 2007. It is a migration, so you can absolutely choose which version to go with as you will be putting in a new 64 bit server. Cheers Nathan