Under Personal Settings, click User Information.The author and contact information that you specify automatically appears in all your Office documents, including those that you share with other people, unless you remove your personal information from a document.
To help maintain the level of privacy that you want, you can edit or remove any of the author and contact information that is associated with Office documents. To specify the personal information that appears in Office documents, Office:Mac has this advice: You must remove that information manually.