The key typically looks like this: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Why You Need a Genuine Office 2016 Key
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
A product key is a 25-character alphanumeric code used to activate the software. It acts as a digital thumbprint that proves your copy of Office is genuine. Without this key, the software will run in "Reduced Functionality Mode," meaning you can view documents but cannot edit, save, or create new ones. product key for microsoft office 2016
The Role and Management of Product Keys for Microsoft Office 2016 product key for microsoft office 2016