Microsoft’s new Outlook takes 10 seconds to do what Outlook Classic does instantly on Windows
windowslatest.com Jun 15, 2026

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

AI-summarised brief · reviewed before publication

Microsoft's new Outlook for Windows has a notification issue that delays users by 10 seconds when clicking on a notification for a new email. This problem arises from the app's reliance on WebView2, a Chromium-based rendering engine, which requires a browser-like process chain to initialize and render each interaction. In contrast, the classic Outlook app opens new emails almost instantly. The issue has been a point of contention for users since the new Outlook's release, with some even protesting its introduction.

💡 Why It Matters

  • · The notification delay in new Outlook highlights the limitations of Microsoft's WebView2 technology, which may hinder its adoption in enterprise environments.
  • · This issue underscores the need for Microsoft to optimize its web-based applications to meet the performance expectations of users.