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Microsoft new Outlook takes 10 seconds to do what Outlook Classic does instantly

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

windowslatest.com

June 18, 2026

7 min read

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72/100

Summary

Microsoft's new Outlook for Windows takes approximately 10 seconds to open an email from a notification, while the classic version does so instantly. Windows 11 includes both Outlook Classic and the new Outlook, with Microsoft promoting the latter as the future of email on the platform.

Key Takeaways

The new Outlook for Windows takes approximately 10 seconds to open a specific email from a notification, while Outlook Classic does so almost instantly.
New Outlook is built on Microsoft's WebView2, which causes delays due to the need for browser-like processes to load emails.
Microsoft has postponed the forced opt-out deadline for enterprises to switch to the new Outlook from April 2026 to March 2027, indicating the app is not fully ready for all workloads.
New Outlook has improved launch speeds but still performs slower than Outlook Classic when responding to email notifications.

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Community Sentiment

Negative

Positives

Running the new Outlook in a web browser is significantly faster than the desktop client, indicating potential for improved performance in web-based applications.
The new Outlook's compatibility with Linux offers users more flexibility and options, reducing reliance on Windows for corporate emailing.

Concerns

The new Outlook's performance issues, such as slow loading times and poor usability, highlight a troubling trend in software development prioritizing features over efficiency.
Users experience frustrating delays when composing emails, which undermines productivity and suggests a lack of optimization in the application's design.
The reliance on web technologies for Outlook has resulted in a sluggish experience, raising concerns about the future of desktop applications in a cloud-centric world.