System Issues/Outage
Microsoft Update at Microsoft service health status:
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.
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.
Previous status: 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.
Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.
Next update by: Thursday, November 12, 2026, at 6:30 PM
Microsoft Update at Microsoft service health status:
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 5:00 PM
Microsoft Update at Microsoft service health status:
User impact: Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods.
More info: Potentially impacted connection methods may include:
– Outlook on the web
– Messaging API (MAPI)
– Exchange ActiveSync (EAS)
– Representational State Transfer (REST) API
Current status: We’ve identified connectivity errors occurring on a portion of Exchange Online infrastructure which receives and processes users’ access requests. We’ve collected networking logs to review to further investigate the source of these errors and confirm our next steps.
Scope of impact: This issue may affect users attempting to access their mailbox in Exchange Online using the affected connection methods.
Next update by: Thursday, November 12, 2026, at 3:00PM EST
Issue Reported at 12:45pm on November 12: Microsoft has identified an issue that is causing connectivity problems with Outlook today. As a result, you may experience issues accessing Outlook and other Microsoft 365 applications this afternoon. We will provide an update here as soon as Microsoft provides more information or resolves the issue.
