Microsoft Outlook Is Not Opening Or Responding

Hannah Brinson 0 Reputation points
2026-11-12T19:43:08.8833333+00:00

Hi All.

I've been over 2 hours trying to get outlook to respond, open ... ANYTHING. I use outlook via web browser and the page will not load. Every now and again it will come up 'server error'. My internet is working perfectly fine to use other applications and websites. It is JUST outlook that is not working. I've 'repaired' the application in my computer settings and that has not done anything to fix the issue either.

How can I fix this as it's derailed my work day.

TY

Outlook | Windows | New Outlook for Windows | For business
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  1. Chris-D 2,700 Reputation points Independent Advisor
    2026-11-12T19:44:58.0633333+00:00

    Hi Hannah,

    Thank you for sharing your situation.

    I'm experiencing a similar issue on my end as well. Microsoft has recently acknowledged a new incident (MO1550821) regarding connectivity issues affecting multiple Microsoft 365 services, including Exchange Online, Microsoft Teams, SharePoint Online, and other services.

    User's image

    If you are an admin, you can review Microsoft's service health advisory directly through the Microsoft 365 Admin center. If you're an end user without admin permissions, kindly reach out to your Microsoft 365 administrator and ask them to monitor this incident and keep you informed of any relevant updates.

    I hope the issue will be resolved soon.

    Note: Follow the steps in the forum documentation to enable email notifications if you want to receive email notifications related to this topic.     

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  2. AI answer

    2026-11-12T19:43:39.07+00:00

    Because the tag indicates New Outlook for Windows, classic Outlook fixes such as Safe Mode, COM add-ins, creating a new Outlook profile, SCANPST, or the classic Outlook troubleshooter do not apply.

    Try these steps:

    1. End Outlook completely
      • Open Task Manager.
      • End any Microsoft Outlook processes that are still running.
      • Try opening Outlook again.
    2. Open Outlook from Microsoft Store
      • Open Microsoft Store.
      • Search for Outlook for Windows.
      • Launch it directly from the Store page instead of the existing shortcut.
    3. Check Outlook on the web
      • Since the browser version is showing server error while other sites work, try again after closing and reopening the browser.
      • If Outlook on the web still fails but the Windows app opens, use the app temporarily.
      • If the web version works later, that helps confirm the issue is isolated to the app or a temporary Outlook service problem.
    4. Check Event Viewer if the app starts and then hangs or closes
      • Open Event Viewer.
      • Go to Windows Logs > Application.
      • Try opening Outlook again.
      • Check the newest relevant application event for Outlook.
    5. Use the web version temporarily if available
      • If Outlook on the web starts working before the app does, use it as a temporary workaround while continuing app troubleshooting.

    If Outlook still does not open after those steps, the supported guidance for New Outlook for Windows is to avoid classic Outlook repair paths and continue with New Outlook troubleshooting only.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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