You can use Information Rights Management (IRM) in Office 2003 programs to provide restricted access to Office documents. In Outlook, you can use IRM to create messages with restricted permission to help prevent worksheets from being forwarded, printed, copied , or edited by unauthorized people. If you attach an Excel workbook to an Outlook message, the workbook also contains the restriction. IRM uses a server to authenticate the credentials of people who create or receive worksheets or e-mail with restricted permission. For Microsoft Office users without access to one of these servers, Microsoft provides a free trial IRM service, which requires a .NET Passport.
Set Up Information Rights Management
Create a Workbook with Restricted Permission