outage affecting Outlook and several other Microsoft 365 services

Biji Parida 0 Reputation points
2026-11-13T02:56:15.9333333+00:00

Hi, we are affected by the current global Outlook outage (Incident EX1550543). Is there an updated ETA on when Outlook services will be back online?

Outlook | Windows | Classic Outlook for Windows | For business
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  1. JeseminQH 1,210 Reputation points Independent Advisor
    2026-11-13T04:29:30.43+00:00

    Hi @Biji Parida

    From my understanding, there isn't a confirmed ETA for full restoration at the moment. According to the latest service notification (Incident ID: MO1550821), multiple Microsoft 365 services including Exchange Online, Teams, SharePoint Online, Copilot, and Defender XDR are experiencing connectivity issues due to elevated infrastructure load across several regions.

    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

    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 update.

    Please kindly note that this is a user-to-user support forum and as a fellow forum user, I’m unable to directly influence or expedite the resolution, nor can I provide a confirmed timeline for when everything will return to normal. However, please rest assured that the relevant teams are working to get this resolved as quickly as possible.

    I really appreciate your patience and understanding here. Hopefully, the issue will be fully resolved soon so that everything is back up and running smoothly for all of us.

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  2. AI answer

    2026-11-13T02:56:55.08+00:00

    EX1550543 remains listed as an active Exchange Online service degradation, but Microsoft has not published a confirmed restoration ETA at this time.^1^

    Get the latest tenant-specific update

    If you have an appropriate Microsoft 365 administrator role:

    1. Sign in to the Microsoft 365 admin center.
    2. Go to Health → Service health.
    3. Under Active issues Microsoft is working on, open EX1550543.
    4. Review All Updates for the latest:
      • Status and user impact
      • Mitigation and recovery progress
      • Next scheduled communication
      • Any estimated recovery time, if Microsoft publishes one

    The Last updated time or Next update by time is a communication milestone, not necessarily a restoration ETA. Microsoft identifies the Service health incident page as the authoritative location for progress and resolution updates.^2^

    Administrators with the Service Support admin or Helpdesk admin role can view Service health. To receive updates automatically, open EX1550543, select Manage notifications for this issue, and configure email notifications.^2^

    If the admin center is inaccessible, use Microsoft’s public service status page named in the same guidance. Since this is an acknowledged service incident affecting Exchange Online connectivity, local Outlook profile repair or reinstallation is unlikely to restore access; service should recover as Microsoft completes mitigation.

    References

    1. Microsoft 365 – Service Status
    2. How to check Microsoft 365 service health
    AI-generated content may be incorrect. Read our transparency notes for more information.

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