Microsoft Outlook & Exchange webmail is not working

Question

Microsoft Outlook & Exchange webmail is not working

Krishna Prasad BK 0

Microsoft Outlook & Exchange webmail is not working from yesterday night at 11:30 PM onwords

Please look into matter

Thanks

[Moderator note: Personally Identifiable Information removed]

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Answer 1

Dear @Krishna Prasad BK,

I hope you’re having a good day

The issue preventing you from accessing Microsoft Outlook and Exchange webmail since last night is directly caused by an ongoing, widespread Microsoft 365 service outage.

According to Microsoft's official notification (Incident ID: MO1550821), users across multiple regions are currently unable to access their mailboxes via Outlook desktop (MAPI), Outlook on the web (webmail), or Exchange ActiveSync due to a service degradation affecting Exchange Online and several connected Microsoft 365 services.

Latest Status & Resolution Progress (Updated Nov 13, 2026, at 12:43 GMT+7 / 05:43 UTC):

Root Cause & Mitigation: Microsoft engineers identified that a core connection process on the backend servers became overwhelmed. They are currently taking a measured approach to repair and stabilize the affected infrastructure while balancing traffic to restore capacity safely.

Security Confirmation: Microsoft has confirmed that there is no indication of any malicious activity causing this incident.

Screenshot 2026-11-13 at 12.58.13

How to track real-time updates:

If you have Microsoft 365 administrator privileges, please sign in to the Microsoft 365 Admin Center to view the latest technical updates:

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.

If you are a regular user, please reach out to your organization's IT administrator so they can monitor the progress for you. 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 closely and let you know here as soon as Microsoft releases the next update.

Warm regards,

If the answer is helpful, please select "Yes, accept answer". If you have any questions or new updates, please feel free to comment below.

Liora 3,690 Reputation points Independent Advisor

2026-11-13T10:26:30.94+00:00

Hi,

Latest Update (Nov 13, 2026 – Incident MO1550821):

Microsoft's recovery actions are progressing in phases, and some accounts and regions are already regaining normal access to Outlook and Microsoft 365 services.

What to try now: Please refresh Outlook on the web or restart your Outlook desktop app periodically over the next hour, as your mailbox may reconnect as capacity is restored to your region's servers.

No lost emails: Microsoft has prioritized queue processing and extended the email timeout window to 48 hours, so any emails sent to you during the outage are safely preserved and will arrive automatically once your account reconnects.

Next official update: Microsoft will release the next status update by 18:00 GMT+7 (11:00 UTC) today.

I will continue monitoring until Microsoft officially confirms full resolution. Once your access is back or if you found this status update helpful, please consider selecting "Yes, accept answer" so other affected users can more easily find the latest information here.