Microsofts new Outlook takes 10 SEC to do what Outlook Classic does instantly

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Microsoft's new Outlook takes 10 seconds to do what Outlook Classic does instantly on Windows

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Clicking Outlook notifications will take longer to load the email than if you open the app and find the mail directly

Microsoft’s Outlook for Windows has a notification problem that is hard to ignore. Clicking a Windows 11 notification for a new email is supposed to take you straight to that message. Instead, the new Outlook makes you wait, and the numbers are embarrassing.

Windows 11 ships with two versions of Outlook. There is Outlook Classic , the long-running Win32 desktop app built for power users, and there is the new Outlook , which Microsoft is pushing as the future of email on Windows. The newer one is built on WebView2 and is, in essence, a browser window that loads Outlook.com. If you have ever used both side by side, you already know which one feels faster and which one does not.

Outlook has had a complicated reputation for years. The original Win32 app became infamous for being bloated and difficult to configure. Microsoft’s answer was to ditch native code and rebuild from the web up. The result, called the new Outlook, replaced the lightweight UWP Mail and Calendar apps that some Windows users had grown used to. Windows Latest reported back in 2023 how users protested when Microsoft announced plans to retire those UWP apps in favor of a web wrapper. The company pushed ahead anyway, and by late 2024, the Mail and Calendar apps were officially shut down.

Legacy Mail and Calendar apps on Windows 10 | Image Courtesy: WindowsLatest.com<br>Microsoft has also been pushing the new Outlook at enterprises, though it postponed the forced opt-out deadline to March 2027 from the originally planned April 2026. A delay of a full year shows that even Microsoft knows the app is not fully ready for every workload. New Outlook has improved in real ways since launch, but the performance story is still a mixed one, and nowhere is that more apparent than in how it handles notifications.

New Outlook takes 10 seconds to go from notification to the respective mail

Before getting to the frustrating part, credit where it’s due, New Outlook used to be noticeably slow to launch from scratch, but not anymore.

Outlook (classic) vs New Outlook:

https://www.windowslatest.com/wp-content/uploads/2026/06/Outlook-classic-vs-New-Outlook-opening-speed-comparison.mp4

New Outlook now opens almost as fast as Outlook Classic, which is still slightly quicker of the two. But I would say both are neck and neck, at least when it comes to opening speeds.

However, when a new email arrives in Windows 11, a notification banner appears at the bottom right of your screen, and that’s where the problem starts. Clicking that banner, or from the Notification Center, is supposed to take you directly to the email that triggered it.

With Outlook Classic , it opens that specific email almost instantly.

https://www.windowslatest.com/wp-content/uploads/2026/06/Outlook-Classic-opens-from-notifications-instantly.mp4

With the new Outlook , clicking the notification opens the app, loads the full inbox, and then takes around 10 seconds before the specific email from the notification shows up on screen.

https://www.windowslatest.com/wp-content/uploads/2026/06/Outlook-takes-10-seconds-to-show-the-e-mail-from-notification.mp4

What makes this even more absurd is that if you ignore the notification banner and instead open Outlook directly from the Start menu, you can find and click the new email from within the app and be done with it, all...

outlook windows email from classic microsoft

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