Multiple Microsoft apps and web services aren't working!

Eliana Rose 20 Reputation points
2026-11-12T18:55:35.2433333+00:00

I'm having issues accessing multiple apps and web services today and it's getting a bit frustrating. Earlier, things were a little slow, but I could still access everything and get my work done. However, I can no longer access Outlook, OneNote or Teams. I urgently need to send an email to a business partner, but I can't access Outlook at all. Is anyone else experiencing the same issue? Is there anything I can do to fix this?

Outlook | Web | Outlook on the web for business | Email
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Lin V 1,970 Reputation points Independent Advisor
2026-11-12T19:01:20.15+00:00

Hi Eliana,

Microsoft has officially posted an active service degradation advisory in the Microsoft 365 admin center regarding this outage (tracked under incident ID MO1550821). They are currently investigating a widespread service degradation preventing users from connecting to multiple Microsoft 365 services.

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Currently, Microsoft is actively investigating the issue on their end, so there is no action needed from end users at this time.

In the meantime, please ask your IT administrator (if they still have access to the Microsoft 365 admin center) to monitor MO1550821 under Health > Service health for further updates. Having them use the "Report a problem" feature will also help Microsoft log the impact on your organization's tenant.

I hope this information is helpful.

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  1. Jose Benjamin Solis Nolasco 13,021 Reputation points Volunteer Moderator
    2026-11-12T19:01:31.42+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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