Outage in Microsoft 365
Users' queries to Microsoft 365 Copilot Chat may return no response, and users receive an error
Resolved Minor
September 03, 2026 - Started 2 days ago
- Lasted about 4 hours
Incident Report
Summary AI Generated
Microsoft 365 Copilot Chat experienced a roughly 4-hour outage starting September 3, 2026, where user queries returned no response and displayed a "Something went wrong" error. The root cause was a spike in request traffic that overwhelmed the service infrastructure responsible for processing Copilot Chat responses. Users also reported broader M365 impact, including Intune failing to pull endpoint telemetry, policies not applying to new assets, ESP timeouts during app installs, and Graph API queries via PowerShell freezing.
Title: We're looking into a potential problem impacting Microsoft 365 Copilot Chat
User impact: We're checking for potential impact to your users.
Current status: We're investigating a potential issue impacting Microsoft 365 Copilot Chat and checking for impact to your organization. We'll provide an update within 30 minutes.
User impact: We're checking for potential impact to your users.
Current status: We're investigating a potential issue impacting Microsoft 365 Copilot Chat and checking for impact to your organization. We'll provide an update within 30 minutes.
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Latest Updates ( sorted recent to last )
2 days ago - at 09/03/2026 06:42PM
Title: Users' queries to Microsoft 365 Copilot Chat may return no response, and users receive an error
User impact: Users' queries to Copilot Chat may return no response, and users receive an error.
More info: When users attempt to query Copilot Chat, some of their queries may return no response and instead, users may receive an error that states, "Something went wrong."
Current status: We've identified an increase in request traffic to the portion of service infrastructure responsible for facilitating Copilot Chat responses which is preventing the service from being able to efficiently process requests. We're evaluating our mitigation options to identify the most effective method to remediate the impact.
Scope of impact: Any user attempting to query Copilot Chat may be impacted.
Start time: Thursday, September 3, 2026, at 6:30 AM UTC
Root cause: An increase in request traffic to the portion of service infrastructure responsible for facilitating Copilot Chat responses which is preventing the service from being able to efficiently process requests.
Next update by: Thursday, September 3, 2026, at 9:00 PM UTC
2 days ago - at 09/03/2026 05:27PM
Title: Users' queries to Microsoft 365 Copilot Chat may return no response, and users receive an error
User impact: Users' queries to Copilot Chat may return no response, and users receive an error.
More info: When users attempt to query Copilot Chat, some of their queries may return no response and instead, users may receive an error that states, "Something went wrong."
Current status: Our service health monitoring alerted us to an increase in failures occurring when users attempt to query Copilot Chat. We're reviewing our service health telemetry to isolate the source of the failures, so that we can developed a mitigation plan.
Scope of impact: Any user attempting to query Copilot Chat may be impacted.
Next update by: Thursday, September 3, 2026, at 6:30 PM UTC
2 days ago - at 09/03/2026 05:16PM
Title: We're looking into a potential problem impacting Microsoft 365 Copilot Chat
User impact: We're checking for potential impact to your users.
Current status: We're investigating a potential issue impacting Microsoft 365 Copilot Chat and checking for impact to your organization. We'll provide an update within 30 minutes.
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