Users may be unable to connect to multiple Microsoft 365 services

Title: Users may be unable to connect to multiple Microsoft 365 services

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- Microsoft Copilot 365
- Microsoft Defender XDR
- Microsoft Planner
- Microsoft To Do
- Microsoft Intune
- Microsoft Defender for Office 365
- Microsoft Purview: Multiple Purview services including Authorization, Auto Labelling, Data Loss Prevention (DLP), Communication Compliance, and Data Classification are impacted.
- Power BI: All users may intermittently be unable to export reports with MIP sensitivity labels to PDF in Power BI.
- Microsoft 365 Apps Admin Center: Multiple services including Cloud Update, Cloud Policy, and Inventory.
- Universal Print: Users may encounter errors submitting print jobs or using admin features.
- Windows 365: Customers who have configured their tenant and Cloud PCs to use Microsoft Purview Customer Key for Windows 365 Cloud PCs may have users who are unable to connect to their Cloud PCs.

Current status: We've begun returning a portion of the affected servers to service, and they're remaining stable so far. We’ve also shifted traffic and connections to alternative pathways wherever possible and have observed limited recovery in some regions.

We've streamlined our recovery process to expedite returning the remaining affected servers to service. To further support recovery, we're implementing protective traffic management measures in a specific location to reduce load on the affected infrastructure, and we'll expand these measures to additional locations if we observe positive results. As capacity is restored, users may experience a gradual recovery as their clients reconnect to the service.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next update by: Friday, November 13, 2026, at 12:30 AM UTC

Title: Users may be unable to connect to multiple Microsoft 365 services

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- Microsoft Copilot 365
- Microsoft Defender XDR
- Microsoft Planner
- Microsoft To Do
- Microsoft Intune
- Microsoft Defender for Office 365
- Microsoft Purview: Multiple Purview services including Authorization, Auto Labelling, Data Loss Prevention (DLP), Communication Compliance, and Data Classification are impacted.
- Power BI: All users may intermittently be unable to export reports with MIP sensitivity labels to PDF in Power BI.
- Microsoft 365 Apps Admin Center: Multiple services including Cloud Update, Cloud Policy, and Inventory.
- Universal Print: Users may encounter errors submitting print jobs or using admin features.

Current status: We’re continuing to pursue all available pathways to restore service, as our actions taken thus far have not provided the anticipated relief. Our investigation has found that a core process on the affected servers is becoming overwhelmed, which causes the servers to stop responding and contributes to the capacity loss.

To validate a potential recovery approach, we're fully isolating a portion of our service infrastructure, restarting the affected components, and gradually reintroducing traffic to confirm our services remain stable before applying this approach more broadly. We're also analyzing traffic patterns across our entire service infrastructure and evaluating whether isolating traffic within each region may allow affected regions to recover independently.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next update by: Thursday, November 12, 2026, at 11:30 PM UTC

We're continuing to work through restarting and validating the affected servers to safely return them to service, and we're exploring opportunities to expedite this process. In parallel, we're assessing whether reverting the small number of recent configuration updates we identified could help accelerate recovery.

Next update by: Thursday, November 12, 2026, at 10:30 PM UTC

This quick update is designed to give the latest information on this issue.

Title: Users may be unable to connect to multiple Microsoft 365 services

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: More info: Potentially impacted services include:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- Microsoft Copilot 365
- Microsoft Defender XDR
- Microsoft Planner
- Microsoft To Do
- Microsoft Intune
- Microsoft Defender for Office 365
- Microsoft Purview: Multiple Purview services including Authorization, Auto Labelling, Data Loss Prevention (DLP), Communication Compliance, and Data Classification are impacted.
- Power BI: All users may intermittently be unable to export reports with MIP sensitivity labels to PDF in Power BI.

Current status: We've validated an alternative health check method on a subset of affected infrastructure, which allowed the servers in that subset to successfully return to service, and we're now applying this change more broadly. We're also preparing an automated recovery process to continually detect and restart unresponsive servers, to help keep them in service while this change progresses. Additionally, our review of recent changes has identified a small number of configuration updates that we're investigating as potential contributors to the issue.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next update by: Thursday, November 12, 2026, at 10:30 PM UTC

While validating the targeted change, we found that many of the affected servers have become unresponsive, which is preventing us from confirming whether the change is effective. We're restarting these servers so they can come back online with the change in place, and we're applying the same approach to additional affected portions of our infrastructure to validate the results more broadly.

Next update by: Thursday, November 12, 2026, at 9:30 PM UTC

This quick update is designed to give the latest information on this issue.

Title: Users may be unable to connect to multiple Microsoft 365 services

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- Microsoft Copilot 365
- Microsoft Defender XDR
- Microsoft Planner
- Microsoft To Do
- Microsoft Purview: Multiple Purview services including Authorization, Auto Labelling, Data Loss Prevention (DLP), Communication Compliance, and Data Classification are impacted.

Current status: While we haven't identified any recent changes that correlate with the start of impact, our investigation indicates the failed health checks may originate from a specific component on the affected servers that's responsible for processing them. We're deploying a targeted change to bypass this component on a subset of servers to validate whether this restores availability, and we've taken steps to prevent additional servers from being removed from service while we work to return the affected servers to service. We're also investigating why affected servers are experiencing elevated processor usage while handling requests.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next update by: Thursday, November 12, 2026, at 9:30 PM UTC

We've identified that affected servers are failing automated health checks, which is causing them to become unavailable, and this may be related to a recent change to a component involved in processing those checks. We're testing a configuration change on a subset of affected infrastructure to address this and, if successful, will apply it more broadly. In parallel, we've initiated a restart of all affected servers and are validating whether they're successfully returning to service.

This quick update is designed to give the latest information on this issue.

Next update by: Thursday, November 12, 2026, at 10:00 PM UTC

Title: Users may be unable to connect to multiple Microsoft 365 services

User impact: Users may be unable to connect to multiple Microsoft 365 services.

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- Microsoft Copilot 365
- Microsoft Defender XDR

Current status: We're aggressively pursuing all pathways to reduce impact. As a precaution, we've paused all deployments and configuration changes while we review recent changes for any correlation to this event. We've determined that the elevated load isn't driven by an overall increase in traffic, but by a large number of servers being unexpectedly unavailable, which is shifting load onto the remaining infrastructure. We're investigating what's causing these servers to become unavailable while we work to safely return them to service.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next update by: Thursday, November 12, 2026, at 10:00 PM UTC

Title: Users may be unable to connect to multiple Microsoft 365 services

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- Microsoft Copilot 365
- Microsoft Defender XDR

Current status: We've completed redistributing connection traffic across our worldwide infrastructure, and we're moving additional traffic off the affected infrastructure to further reduce load. We're also restarting affected servers to return them to service. In parallel, we're investigating whether the elevated traffic reflects a genuine increase in requests or a shift in how traffic is being routed across our infrastructure.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next update by: Thursday, November 12, 2026, at 9:00 PM UTC

Title: Users may be unable to connect to multiple Microsoft 365 services

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- Microsoft Copilot 365
- Microsoft Defender XDR

Current status: We’re investigating an issue impacting multiple Microsoft 365 services and we've determined the affected infrastructure is experiencing elevated load across multiple regions, which is likely contributing to the connectivity errors. We're restarting and repairing impacted portions of this infrastructure to restore capacity, and reviewing an unexpected increase in a specific type of service traffic to determine whether it's contributing to the elevated load. In parallel, we're evaluating options to redirect traffic to alternate infrastructure to expedite relief.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next update by: Thursday, November 12, 2026, at 8:30 PM UTC