Why Is Outlook Still Down? Microsoft Faces Fresh Recovery Delays

Why Is Outlook Still Down? Microsoft Faces Fresh Recovery Delays

Microsoft is facing fresh difficulties restoring Outlook after its global service outage disrupted email access and other Microsoft 365 services. On Friday, November 13, 2026, the company said its recovery changes were not working as expected, forcing engineers to explore alternative ways to restore capacity and stabilise affected systems.

The outage began on Thursday, November 12, and affected Exchange Online, the infrastructure behind Microsoft Outlook. Although some servers have returned to service, others remain unstable, leaving users experiencing continued connectivity problems.

Why Is Outlook Still Down?

Outlook remains disrupted because Microsoft is still struggling to restore stable operation across affected servers.

The company's investigation found that some servers were unexpectedly becoming unavailable after failing automated health checks. This reduced available infrastructure and placed additional pressure on the servers that remained operational.

Microsoft initially attempted to restart affected servers, redirect traffic and introduce changes intended to improve server availability. However, some machines that returned to service became unresponsive again when they started receiving traffic.

In its latest recovery efforts, Microsoft reported further problems with machines remaining in a bad state, preventing some changes from syncing as expected.

Why Did Microsoft's Attempts to Fix Outlook Fail?

Microsoft's first recovery measures did not deliver the expected improvement.

The company had been testing changes to server health checks, restarting affected components and gradually returning servers to service. While some of these measures initially showed positive results, restored servers later experienced problems when traffic returned.

Microsoft subsequently confirmed that changes intended to improve serviceability were not taking effect as expected.

Engineers are now exploring alternative recovery methods, including increasing virtual machine capacity, managing traffic and attempting to force synchronisation of a recent network change.

These complications explain why the outage has continued despite Microsoft's repeated attempts to restore normal service.

What Caused the Microsoft Outlook Outage?

Microsoft's investigation identified server availability and health-check failures as important factors behind the disruption.

Some affected servers unexpectedly failed automated health checks and became unavailable. The remaining infrastructure then experienced increased load, contributing to connectivity errors.

Microsoft also found that a core process on affected servers was becoming overwhelmed, causing further capacity problems.

However, the precise underlying cause has not been conclusively established. Microsoft is still investigating the behaviour of affected machines and the network changes involved.

Is the Outlook Outage a Cyberattack?

Microsoft has said there is no indication that the outage resulted from malicious or cyber activity.

The company has not attributed the disruption to hackers or confirmed a security breach involving customer accounts.

The investigation has instead focused on infrastructure availability, server behaviour, network changes and recovery difficulties.

Is Outlook Still Down on November 13?

Microsoft has begun restoring affected infrastructure, but full recovery has not been confirmed in the latest available updates.

The company has reported limited recovery in some areas, while continuing to work on machines that remain unresponsive or unstable.

The disruption affects Exchange Online mailbox access through multiple connection methods, including Outlook on the web and other Exchange connections.

The exact experience may vary between users and regions as Microsoft works to restore capacity.

When Will Microsoft Outlook Be Fixed?

Microsoft has not announced a confirmed time for full restoration.

Recovery depends on its ability to stabilise affected machines, restore available capacity and ensure that returning servers can handle normal traffic without becoming unresponsive again.

Until those measures are successful, some Outlook users may continue experiencing intermittent access problems.

Microsoft's next updates are expected through its service health reporting channels.

Where to Check the Latest Outlook Outage Update

Users can monitor Microsoft's official service status through:

• Microsoft 365 Service Health: https://admin.microsoft.com/Adminportal/Home#/servicehealth
• Microsoft Cloud Status: https://status.cloud.microsoft/
• Microsoft 365 Status updates: https://x.com/MSFT365Status

The relevant Exchange Online incident reference is EX1550543.

Microsoft's recovery efforts remain ongoing, and the next major development will be whether its alternative capacity and network recovery measures can bring the affected servers back to stable operation.

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