Microsoft is testing a free, ad-supported desktop edition of Office, available exclusively on Windows. This version includes Word, Excel, and PowerPoint, but features persistent banner ads and muted video ads every few hours. Users face limitations such as restricted access to advanced features and the inability to save documents locally, as files must be stored on OneDrive with a maximum of 5GB for free users. The testing phase is limited, with access granted to a select group, and there are currently no plans for an official launch. Users can try the version by downloading it from the official Office website and following specific installation steps.