office 365 Outlook and SharePoint seems to be unreachable today Nov 12th 2026

Azfar Akram 0 Reputation points
2026-11-12T18:25:03.1366667+00:00

I cannot find any exact information on it. Cannot login to admin portal either to see any alerts. Any one knows what is happening.

Microsoft 365 and Office | Subscription, account, billing | For business | Other
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  1. Jose Benjamin Solis Nolasco 13,106 Reputation points Volunteer Moderator
    2026-11-12T18:57:41.82+00:00

    Welcome to Microsoft Q&A!

    Hello,

    What you are experiencing is currently linked to an active Microsoft 365 service incident tracked under ID EX1550543.

    Microsoft initially reported intermittent connectivity issues affecting Exchange Online mailboxes in the Americas, and has since updated the advisory to confirm that the issue may impact general Microsoft 365 service connectivity across any region.

    What this means for your environment:

    • Affected Services: Primarily Exchange Online / Outlook (desktop client, Outlook on the web, and mobile apps), along with potential authentication or connection timeouts across broader Microsoft 365 services (such as Teams, SharePoint/OneDrive, or the Microsoft 365 Admin Center) that rely on shared front-end connectivity infrastructure.

    Action Required: No configuration changes are needed on your tenant or client devices. Microsoft engineering teams are actively working on mitigation.

    How to track live status:

    Open the Microsoft 365 Admin Center using a Global Admin or Service Support Admin account.

    Navigate to Health > Service health.

    Search for incident ID EX1550543 for real-time mitigation progress and root cause updates.(You can also follow official updates via @MSFT365Status on X).

    Help make this community better for everyone: if this answer resolved your issue, please accept it or leave an upvote. If not, share more details in a comment so we can continue the discussion and find the right solution.

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  2. Chris-D 2,700 Reputation points Independent Advisor
    2026-11-12T18:33:35.88+00:00

    Hi Azfar,

    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 possible, you can also monitor the incident through the Microsoft 365 Admin Center for the latest updates.

    I recommend waiting for further updates from Microsoft and trying again later.

    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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  3. AI answer

    2026-11-12T18:28:36.32+00:00

    An active Exchange Online service incident is affecting Outlook connectivity on November 12, 2026; use the public Microsoft Service Health Status page while your Microsoft 365 admin center is inaccessible.

    Microsoft reports connectivity errors affecting part of the Exchange Online infrastructure, with potential impact to Outlook on the web, MAPI, Exchange ActiveSync, and REST API access ^1^. This means troubleshooting individual Outlook installations is unlikely to help while the service incident remains active.

    What is confirmed

    • Exchange Online/Outlook: An active service-side connectivity issue is confirmed.
    • Microsoft 365 admin center: Your inability to access it is consistent with the broader disruption, but this does not establish that every tenant or region is unable to access the portal.
    • SharePoint Online: There is not yet an explicit Microsoft confirmation of a SharePoint-specific incident in the available public notice. SharePoint symptoms could be related to the broader event, but that has not been confirmed.

    What to do now

    1. Monitor the unauthenticated Microsoft Service Health Status page. Microsoft designates this as the fallback when an incident prevents access to the admin center or its Service health page ^2^.
    2. Avoid tenant-wide configuration, DNS, licensing, or client changes while the incident is active unless Microsoft identifies a required customer action.
    3. When admin access returns, open: Microsoft 365 admin center → Health → Service health → Active issues Microsoft is working on.
    4. Open the relevant incident to review its affected services, user impact, current status, update history, and estimated start time.
    5. If SharePoint remains unavailable after Exchange Online and admin-center access recover, use Service health → Report an issue. If no incident appears, open a support request; Microsoft recommends escalation when your issue is not represented in Service health ^3^.

    After access is restored, configure incident email notifications under Health → Service health → Customize → Email so future notices can reach up to two addresses without relying solely on the portal ^2^.

    References

    1. Microsoft Admin Center Status
    2. How to check Microsoft 365 service health
    3. Microsoft 365, Dynamics 365 & Power Platform incident readiness for Microsoft Engage Center
    AI-generated content may be incorrect. Read our transparency notes for more information.

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