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Office ->Prepare -> Restrict Permission Restrict Access Security is more than "all or nothing." Windows security can be based on Users and User Groups. You can restrict some files so that only the people who are authorized can edit or even open them. This is called Information Rights Management (IRM). IRM is part of Windows Vista, but it can be downloaded and added to Windows XP.   IRM is a licensing program, basically. You add a Use License to each file you want to restrict and indicate which people can use this file.   When you open a restricted file, you need to be online so that you can connect to a server, show your credentials, and download a use license. The use license say what permissions you are given: Read, Read/Write, Edit, Save or Print.   Memo to Self: This image is copied from the Microsoft Help files. Information Rights Management is a client-server product that uses a server to authenticate your rights. IRM may not be available on your installation of Microsoft Office 2007 Professional.