A. Even with Exchange Server 2003 in native mode, you still can't rename the Exchange organization. You would need to totally uninstall Exchange, clean up the server, and reinstall Exchange with the new organization name. You'd also need to export your mail items to personal folder store (PST) files, then use the exmerge.exe tool to import the mail items back in. Finally, you'd have to address problems with recipients who try to reply to existing messages because the X.500 address would have changed (as a result of the new organization name) unless you populate the users in Active Directory (AD) with the original X.500 address.