Here are the details as we know them regarding the major Microsoft Outage. Microsoft, not KartHost, provides this information.
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Users may be unable to access various Microsoft 365 apps and services.
Issue ID: MO821132
Affected services: Microsoft 365 suite
Status: Service degradation
Issue type: Incident
Start time: Jul 18, 2024, 6:13 PM CDT
More info
Users may notice that some of the affected users are seeing relief as we continue to mitigate the impact.
Impacted services may include but are not limited to the following:
- Microsoft Teams
Users may be unable to leverage Microsoft Teams functions including presence, group chats, and user registration.
- Microsoft 365 admin center: Admins may be intermittently unable to access the Microsoft 365 admin center and any action may be delayed if accessible.
Our internal telemetry and customer signals indicate that the following services are recovered:
- Microsoft Defender
- Microsoft Defender for Endpoint
- Microsoft Defender Experts
- Microsoft Intune
- Microsoft OneNote
- OneDrive for Business
- SharePoint Online
- Windows 365
- Viva Engage
- Microsoft Purview
- Microsoft Fabric
- PowerBI
Scope of impact
This issue may impact any user using various Microsoft 365 apps and services.
Preliminary root cause
A configuration change in a portion of our Azure backend workloads caused interruptions between storage and compute resources, resulting in connectivity failures that affected downstream Microsoft 365 services dependent on these connections.
Current status
Jul 19, 2024, 7:29 AM CDT
We're continuing to apply mitigation actions to provide relief from the residual impact affecting the remaining impacted Microsoft 365 apps and services. Our telemetry is indicating that the remaining impacted scenarios are progressing toward a full recovery, and we're closely monitoring to ensure this
progress continues.
Next update by:
Friday, July 19, 2024 at 9:30 AM CDT
History of updates
Jul 19, 2024, 6:52 AM CDT
Jul 19, 2024, 5:24 AM CDT
The underlying cause of the issue has been fixed, and several Microsoft 365 apps and services have been restored to full functionality. Residual impact is still affecting some Microsoft 365 apps and services, and Microsoft 365 engineering is continuing to conduct additional mitigation actions to provide relief. We're continuing to observe an increase in functionality and availability for the remaining impacted scenarios, and we're monitoring this closely to ensure we're progressing towards full recovery. Microsoft is continuing to treat this event with the highest possible priority.
Jul 19, 2024, 4:37 AM CDT
Jul 19, 2024, 3:28 AM CDT
We're continuing to see an improvement in service availability across multiple Microsoft 365 apps and services. We're closely monitoring our telemetry data to ensure this upward trend continues as our mitigation actions continue to progress.
Jul 19, 2024, 2:18 AM CDT
Jul 19, 2024, 1:30 AM CDT
Jul 19, 2024, 12:33 AM CDT
Jul 18, 2024, 11:28 PM CDT
Jul 18, 2024, 10:28 PM CDT
Jul 18, 2024, 9:22 PM CDT
Jul 18, 2024, 8:24 PM CDT
Jul 18, 2024, 7:44 PM CDT
Jul 18, 2024, 7:21 PM CDT
We remain focused on redirecting the impacted traffic to healthy systems as we investigate the root cause. Your organization may experience relief as our mitigation efforts progress. We understand the impact that this issue may have on your organization and we're continuing to treat this event with the highest priority.
Jul 18, 2024, 6:58 PM CDT
Jul 18, 2024, 6:36 PM CDT
We're rerouting affected traffic out of the impacted infrastructure while we continue to investigate the cause of the issue.
Jul 18, 2024, 6:15 PM CDT
We're investigating reports of issues in which users are unable to access various Microsoft 365 apps and services. We're looking into the cause of this incident and the best mitigation pathway forward. We will provide an update within 30 minutes.
