Attached to your under "Services & Subscriptions." In your confirmation email if you purchased a digital copy.
: Unofficial "cracks" often modify core system files, which can lead to frequent crashes, data loss, or the inability to install future security updates.
When you purchase Microsoft Office 2013, you receive a product key that you need to enter during the installation process to activate the software. Without a valid product key, you cannot activate Office 2013, and some features may not be available.