: Visit Microsoft365.com/setup to redeem your 25-character key and download the installer.
To start the process, you need the official installer. While retail versions are typically tied to a Microsoft Account, volume license versions can be managed through specialized tools: : Visit Microsoft365
: Users can join the Office 365 Developer Program to get a free, renewable subscription for testing and development purposes. : Some users activate volume versions via Command
: Some users activate volume versions via Command Prompt by connecting to a KMS server, though this is primarily for institutional environments. Using product keys with Microsoft 365 go to File > Account
: You can use the free web versions of Word, Excel, and PowerPoint by pressing Ctrl + Shift + Win + Alt on your keyboard to open the Microsoft 365 portal .
: If you have an ISO file, right-click to Mount it and run setup.exe to begin the installation. 2. Official Activation Methods
: Open any Office app (like Word or Excel), go to File > Account , and select Change Product Key to enter your 25-digit code.