New Outlook for windows performance diagnostic

INT66 Risla 20 Reputation points
2026-06-30T03:32:34.6866667+00:00

users are complaining that the new web-based Outlook for Windows takes upwards of 10 seconds to load and navigate compared to the near-instant performance of Outlook Classic. Where inside Intune Endpoint Analytics can we measure this application launch latency to build a case for delaying the classic retirement?

Outlook | Web | Outlook on the web for business | Settings
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  1. Xuan Nhu 890 Reputation points Independent Advisor
    2026-06-30T06:41:30.4533333+00:00

    Hi Risla,

    I'm sorry to hear that your users are experiencing slow performance with the new Outlook for Windows.

    Regarding your question, Intune Endpoint Analytics does not currently provide application launch-time metrics, such as measuring how long Outlook takes to open. Endpoint Analytics focuses on application reliability and stability, including crashes, usage duration, and Mean Time to Failure (MTTF), rather than startup latency. For more details, please refer to Application Reliability Report in Endpoint Analytics - Microsoft Intune | Microsoft Learn.

    For investigating slow startup or navigation in the new Outlook, Microsoft recommends collecting an Outlook Performance Trace, which is the most reliable way to analyze responsiveness and startup-related issues.

    My recommendation is to combine Endpoint Analytics data (startup performance, resource utilization, and application reliability) with Outlook Performance Traces and user feedback. This will provide stronger evidence when assessing the impact of New Outlook performance, as there is currently no dedicated launch-latency metric available in Endpoint Analytics

    References: 

    Collect a Performance Trace in New Outlook for Windows - Outlook | Microsoft Learn

    How to troubleshoot performance issues in Outlook | Microsoft Support

    1. Application Reliability Report in Endpoint Analytics - Microsoft Intune | Microsoft Learn

    If you need any further information, feel free to let me know. Thank you.

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