For many users, downloading "old" or "classic" Outlook for Windows 11 isn't just about nostalgia—it's a quest for and advanced features that the modern, web-based version hasn't quite mastered yet.

If the "New Outlook" app is already running, you can often switch back without a new download: Install or reinstall classic Outlook on a Windows PC

If you are looking to revert to the familiar interface with full PST support, COM add-ins, and robust offline capabilities, this guide will show you how to get the "Old Outlook" back on Windows 11.

: Many professional add-ins and third-party tools only work with the classic version.

These files are often outdated, lack security updates, or contain malware. Because Outlook handles your personal communications and credentials, you should download the installer directly from Microsoft's official portals.

Click Download to get the OfficeSetup.exe file. Run this file to install the full desktop version.

If you are using the pre-installed "Mail" app on Windows 11 and want the actual Classic Outlook software, you need to install the full Microsoft 365 suite.

If you recently updated your Windows 11 PC or installed Microsoft 365, you may have noticed a prompt urging you to switch to the "New Outlook." While Microsoft is aggressively pushing this modernized version (a web-wrapper based on the Outlook.com experience), many power users prefer the classic, desktop-integrated version—officially known as or the Classic Outlook Desktop Client .

Toggle out of the new Outlook for Windows - Microsoft Support

Microsoft has announced the eventual sunset of "Classic Outlook." The roadmap suggests that starting in 2026, the Classic client will begin to be phased out in favor of the New Outlook for commercial users as well.

Fortunately, Classic Outlook is still available for download and will be supported until at least . How to Download Classic Outlook

Once installed, find "Outlook Classic" in your Start menu and sign in with your Microsoft 365 or Office perpetual license account. How to Revert from New Outlook to Classic