outlook won't open

Account Payable 0 Reputation points
2026-11-13T02:37:32.3666667+00:00

I had to uninstall outlook on my windows PC and I keep getting an eroor page saying

outlook.office.com can't currently handle this request.

HTTP ERROR 500

Outlook | Windows | New Outlook for Windows | For business
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  1. Aetherin 3,930 Reputation points Independent Advisor
    2026-11-13T02:46:32.2833333+00:00

    Hi @Account Payable,

    I would like to share an update regarding the connectivity issue affecting multiple Microsoft 365 services.

    According to Microsoft's notification (Incident ID: MO1550821), users may be unable to connect to or access multiple Microsoft 365 services, including Exchange Online, Microsoft Teams, SharePoint Online, Microsoft Copilot, and Microsoft Defender XDR.

    Microsoft has identified that the affected infrastructure is experiencing elevated load across multiple regions, which is likely contributing to the connectivity errors. Microsoft is currently restarting and repairing impacted portions of the infrastructure to restore capacity. Additionally, they are investigating an unexpected increase in a specific type of service traffic and evaluating options to redirect traffic to alternative infrastructure to expedite recovery.

    The incident is currently classified as Service Degradation, and Microsoft is actively investigating and working to mitigate the issue.

    User's image

    If you have access to the Microsoft 365 Admin Center, you can review Microsoft's service health advisory and follow the latest updates directly through this incident link.

    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.

    Please kindly note that this is a user-to-user support forum, and I’m an end user just like you, not a member of the product team. As such, I’m unable to directly influence or expedite the resolution, nor can I provide a confirmed timeline for when the issue will be fully resolved and all services will return to normal. However, please rest assured that the relevant teams are working hard to resolve this issue as soon as possible.

    I sincerely appreciate your patience and understanding. Hopefully, Microsoft will be able to resolve this issue soon so that we can all regain normal access to the affected services.

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  2. AI answer

    2026-11-13T02:37:43.5+00:00

    For New Outlook for Windows on a Windows PC, try this repair path first:

    1. Go to Start > Settings > Apps > Installed apps.
    2. Find New Outlook.
    3. Select Advanced options.
    4. Choose Repair.
    5. Restart the PC and try opening Outlook again.

    If it still fails:

    1. Go back to Advanced options for New Outlook.
    2. Choose Reset.
    3. Restart the PC and test again.

    If the app still does not open:

    1. Uninstall New Outlook.
    2. Restart the PC.
    3. Install New Outlook again.

    Because the error shown is HTTP 500, if the same failure also happens in the web experience or across multiple attempts after reinstalling, use Microsoft Support for further assistance.

    References:

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

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