Help me resolve an issue with Outlook

Dalton Esme 20 Reputation points
2026-11-13T02:28:35.39+00:00

Since this morning, I haven't been able to access my new emails, everything seems to be interrupted.

Outlook | Windows | New Outlook for Windows | For business
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  1. Elena-VH 2,615 Reputation points Independent Advisor
    2026-11-13T02:33:13.1533333+00:00

    Dear Dalton Esme,

    In this case, 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 Microsoft 365 suite, Microsoft Copilot, Exchange Online, Microsoft Teams, SharePoint Online, 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.

    Regarding the restoration timeline and email delivery, Microsoft will provide official updates through the Service Health dashboard. I would recommend contacting Microsoft 365 business support if the issues persist or require further investigation.

    If you have Microsoft 365 administrator privileges, please sign in to the Microsoft 365 Admin Center to view the details of this issue.

    • Sign in to the Microsoft 365 Admin Center.
    • Go to Health > Service Health.
    • Search for Issue ID: MO1550821.
    • Select the issue and expand the details to review the latest updates, affected services, impact, and remediation information.

    Note: If you don't know who the admin is in your organization, you can find guidance here: How can I find my Microsoft 365 admin? - Microsoft Support    

    I'll continue to monitor this case and let you know if there are any updates.

    Kind regards.

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  2. AI answer

    2026-11-13T02:28:56.3933333+00:00

    Use this quick isolation path for New Outlook for Windows:

    1. Check whether the mailbox is receiving mail in a browser Sign in to Outlook on the web. If new mail appears there, the mailbox is working and the issue is likely limited to the New Outlook app.
    2. Remove and re-add the account in New Outlook In New Outlook:
      • Go to Settings > Accounts > Email accounts
      • Remove the affected account
      • Close Outlook completely
      • Reopen Outlook and add the account again using the full email address and password
    3. Make sure New Outlook is up to date In New Outlook, go to Settings > About and confirm the app is fully updated.
    4. Switch to Classic Outlook to confirm whether this is a New Outlook-specific issue Use the toggle in the upper-right corner to switch back to Classic Outlook and check whether new mail appears there.
    5. If mail is missing in Outlook.com as well, check common mailbox causes
      • Check the Other tab
      • Check the Junk Email folder and settings
      • Check whether email forwarding is enabled
      • Check for rules that may be moving or hiding messages
      • If messages appear out of order, select Filter > Sort > Date
    6. If using Outlook.com with a third-party connected mail service The third-party service must support modern authentication and IMAP. If IMAP or POP are active, disable them and test again.
    7. If the issue continues in a business tenant, escalate from the admin side An admin can check:
      • Domain health in the Microsoft 365 admin center
      • Message trace to see whether inbound mail is reaching the tenant
      • Whether mail is being redirected by rules, connectors, or quarantine

    If the problem started after a recent app change and Outlook on the web works normally, the most direct next step is remove and re-add the account in New Outlook, then test again.

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

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