Microsoft gets tough on Office fakers | CNET News.com
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Microsoft is making its antipiracy check mandatory for Office.

The company introduced Office Genuine Advantage in April as a voluntary way for people to ensure that they only used licensed and legal copies of the productivity software. But as of Friday, Office Online templates downloaded from within Microsoft Office System 2007 applications will require validation of the Office software in use.

And as of January 2007, people will also have to complete the authentication test if they want to use Office Update.