What is a Product Key and why is it required?
A Product Key is a unique 25-character alpha-numeric code used to set up your Microsoft account and install Office.
Where do I find my Product Key?
The Product Key is printed on the card inside the Microsoft Office packaging. To find your Product Key, open the packaging and remove the card. The 25-character alpha-numeric code is printed on the back of the card. Sample Product Key format: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX .
Business support for Office 365
Knowing Office 365 for business
Get started with Office 365 for business
Manage subscription and installs
Cancel / Transfer / Share an Office subscription
Help with Microsoft account
Help with My Account for Office
Support for Mac
Install Office 365 Home Premium on a Mac
Set up Outlook for Mac 2011
Mac software updates
Technical support for Mac
Install Office 365, 2013
Install Office 2010
Install Office 2007, 2003 or lower
Product key help
Contact Office Support
Continued support for Office 2003 when it is ending