You need to recover an earlier draft of a PowerPoint presentation after an accidental deletion, overwrite, or unwanted edit. OneDrive stores automatic version history for all files saved to OneDrive or SharePoint, including PowerPoint files. This article explains how to locate, preview, and restore a previous version of a PowerPoint file from OneDrive.
Version history is enabled by default for files stored in OneDrive and SharePoint. You do not need to turn on any special setting. Every time you save a PowerPoint file to OneDrive, a new version is created. Older versions are kept for up to 30 days for free OneDrive accounts and up to 500 versions for Microsoft 365 subscribers. This article covers both the browser-based method and the desktop application method.
You will learn the exact steps to access version history from onedrive.com, from the PowerPoint desktop app, and from the SharePoint web interface. The article also explains what happens when you restore an older version and how to avoid losing newer changes.