After reinstalling the domain and server, users can also see the mail?

User: My current server system is Windows2000-Exchange2003. Now I have to upgrade the system to Windows2003+Exchange2003. I will install Windows2003 and Exchange2003 on two servers respectively. No change, some account information is lost in the current development, so I plan to re-install Windows 2003 again after reinstalling Windows 2003. How can I back up existing emails on the existing server after reinstalling the domain and server? Can the user still see the previous mail? Tang Tao: First find the Exchange2003 mail storage directory, back up all the mail, install it and then save this directory, you can.