
checked Sep 11, 2026 7:47 PM UTC · Microsoft 365's official status page
Is Microsoft 365 Down Right Now?
Somewhat. Microsoft 365 Microsoft 365 Copilot Chat is slower than normal.
Microsoft 365 Microsoft 365 Copilot Chat is experiencing degraded performance with some services running slower than normal.
- Last broke
- Sep 11
- Uptime
- 100.00%
90 day period
1 of 5 components affected
Some users' Exchange Online email messages may not be retrieved when prompting Microsoft 365 Copilot Chat
Title: Some users' Exchange Online email messages may not be retrieved when prompting Microsoft 365 Copilot Chat User impact: Users' Exchange Online email messages may not be retrieved when prompting Copilot Chat. More info: Some Exchange Online email messages between July 22, 2026, and today may not be retrieved by Copilot Chat when prompted. While we index the affected email messages to our semantic index model, users can prompt Copilot Chat using exact wording to retrieve the email messages. Current status: The fix to correct the code and ensure that future email messages will be indexed correctly is being deployed. In tandem we're repairing the affected email messages and indexing them to fully remediate the impact. Scope of impact: Some users that are attempting to prompt Copilot Chat to retrieve details from Exchange Online email messages between July 22, 2026, and today may be impacted. Start time: Wednesday, July 22, 2026, at 10:07 PM UTC Root cause: A service change introduced a misconfiguration that prevented Exchange Online email messages between July 22, 2026, and today from being indexed by our semantic index model, causing impact. Next update by: Friday, September 11, 2026, at 9:00 PM UTC
View full incident detailsService health
Service health, last 90 days
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The record
90 day period · not affected by the range aboveAvailability counts operational or degraded time as available, averaged equally across all monitored components. Partial outages count as half downtime and major outages count in full, scheduled maintenance is excluded from the calculation, and periods with no recorded status are counted as available rather than assumed down. Each component is tracked independently to give you a clear picture of overall service reliability.
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Recent Microsoft 365 outages & status updates
Status changes and service events for Microsoft 365 over the last 30 days
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Microsoft 365 Copilot Chat experienced degraded performance
Sep 11 · still ongoing
Some users' Exchange Online email messages may not be retrieved when prompting Microsoft 365 Copilot Chat
Sep 11 · reported by Microsoft 365 · ongoing
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