thanks....

http://technet.microsoft.com/en-us/library/bb124350.aspxMark Morowczynski|MCT| MCSE 2003:Messaging, Security|MCITP:EMA 2K7,EDA Win 7,ES,SA,EA|MCTS:Windows Mobile Admin|Security+|http://almostdailytech.com

Hi,I agree with Mark's answer (http://technet.microsoft.com/en-us/library/bb124350.aspx). However, i wanted to give you more inputs on this.1. Have a look on: http://technet.microsoft.com/en-us/library/aa998604.aspx before you plan a road map.2. In case if you have legacy 2003 server, follow http://technet.microsoft.com/en-us/library/aa997914.aspx first. For planning:Exchange 2003 - Planning Roadmap for Upgrade and Coexistence - http://technet.microsoft.com/en-us/library/aa998186.aspx Exchange 2007 - Planning Roadmap for Upgrade and Coexistence - http://technet.microsoft.com/en-us/library/dd638158.aspxCheers :)<!----> - Nagesh

another good one: Exchange Deployment Assistant http://technet.microsoft.com/en-us/exdeploy2010/default.aspx