I'm about to conduct an upgrade of Exchange 2000 to 2003. This is currently working under Windows Server 2000. Is there anything I need to be made aware of before I start or is it simply putting the Exchange 2003 disk in the server and following a step by step process? Are there any changes that I need to make to the client workstations or any configuration changes I need to make to the server before I begin or during the process. I know I need to have SP4 for Windows 2000 and the latest service pack for Exchange 2000, just need to know if there is anything in addition to that.