We run Exchange 2003 e-mail system, and need to be able to store e-mails for a period of 3 years. However, the system needs to store all e-mails that are sent or received without allowing users to be able to delete them (from the server). Right now, if a user deletes a message in their local inbox, the message also goes away on the server.
How can I implement this? Its fine if a user wants to delete messages out of their local inbox, but they must remain in the server for 3 years. How can I also set time constraints so that e-mails automatically delete after 3 years?