10 Best Windows 11 Outlook Cleanup Tools
If your Outlook on Windows 11 feels slow or bloated, start with Microsoft’s built-in cleanup tools, then add a focused add-in for duplicates and (optionally) one for attachment bloat. Your choice depends on whether you’re using the new Outlook for Windows (web-based, limited to web add-ins) or classic Outlook desktop (Microsoft 365/2019/2021, supports COM add-ins). Quick answer New Outlook users: Built-in Clean Up,