Office XP er underlagt MPA Microsoft Product Activation. Kan sammenlignes med WPA Windows (XP) Product Activation.
Microsoft Office XP
Microsoft Office ХР applications may be launched up to 50 times after installation without Product Activation (note, that this implies total number of launches of any Office applications). Each time you start an Office application, the activation wizard also starts and displays the activation reminder screen showing the number of grace launches left.
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http://www.microsoft.com/rus/licensing/mpa/eng/general.asp