If you purchase a legitimate retail key, the process is generally smooth:
// Check if Office is activated using the Microsoft.Office.Core namespace return OfficeSettings.IsActivated(); product key for office
If you’ve already purchased Office but lost your key: If you purchase a legitimate retail key, the
: For subscription-based plans, you typically don't receive a product key. Instead, your license is linked directly to your Microsoft account . How to Find Your Office Product Key product key for office