Simply visit the Microsoft Education website and enter your school email address. If your institution is enrolled, you will be granted a free license immediately. This is one of the best ways to get a legitimate product key without cost.
Microsoft Office 365 is a subscription-based service, unlike older versions of Office that used a one-time "perpetual" license key. Today, your "key" is actually your Microsoft account. When you see websites listing long strings of characters labeled as "free keys," they are typically: Microsoft Office 365 Product Key Free