A product key is a unique 25-character alphanumeric code (formatted as XXXXX-XXXXX-XXXXX-XXXXX-XXXXX) used to redeem a license. While many users search for "free" lists of these keys, most codes found online on forums or "key generator" sites are either expired, blocked by Microsoft, or part of unauthorized volume licenses that can be deactivated at any time. How to Properly Activate Microsoft Office 365
: If you subscribe through the Microsoft Store , no key is needed. Simply sign in to your Office apps (Word, Excel, etc.) with the email address you used for the purchase. microsoft office 365 product key with activation code 100
Microsoft Office 365 Product Keys and Activation: A Complete Guide A product key is a unique 25-character alphanumeric
: If you bought a physical or digital product key card from a retailer, you must redeem it at Microsoft365.com/setup . This "attaches" the license to your Microsoft account forever. Simply sign in to your Office apps (Word, Excel, etc