OHIO Systems Status
Email and other Microsoft Exchange Online Services
Incident
Report for Ohio University
Resolved
Microsoft (our provider) has indicated all issues are resolved. Their full update is below:
Final incident update from Microsoft:
Issue ID: MO1020913
Affected services: Microsoft 365 suite
Status: Service restored
Issue type: Incident
Start time: Mar 1, 2025, 3:40 PM EST
End time: Mar 1, 2025, 4:45 PM EST
Current status
Following our reversion of the problematic code change, we've monitored service telemetry and worked with previously impacted customers to confirm that service is restored.
User impact
Users may have experienced issues with one or more Microsoft 365 services.
More info
Impact scenarios from this event included:
• Users were unable to authenticate to Microsoft 365 services, including Exchange and Outlook.
• Users were able to authenticate to Microsoft Teams; however, users experienced degraded functionality including impact to chat/team creation and search.
• Users experienced issues with connectors/flows in the Microsoft Power Platform and logic apps.
• Users received 500 errors and were unable to access the Purview service.
Scope of impact
Any user attempting to access or use the services and features outlined within the 'More info' section of this communication were impacted.
Root cause
A recent update to our authentication systems contained a code issue, resulting in impact.
Next steps
• We're reviewing our change management process to better understand how the impacting change was not detected in our testing cycle.
• We're reviewing all related service telemetry as we work to produce a post-incident report.
We'll produce a preliminary post-incident report in two business days, and a final post-incident report in five business days.
Final incident update from Microsoft:
Issue ID: MO1020913
Affected services: Microsoft 365 suite
Status: Service restored
Issue type: Incident
Start time: Mar 1, 2025, 3:40 PM EST
End time: Mar 1, 2025, 4:45 PM EST
Current status
Following our reversion of the problematic code change, we've monitored service telemetry and worked with previously impacted customers to confirm that service is restored.
User impact
Users may have experienced issues with one or more Microsoft 365 services.
More info
Impact scenarios from this event included:
• Users were unable to authenticate to Microsoft 365 services, including Exchange and Outlook.
• Users were able to authenticate to Microsoft Teams; however, users experienced degraded functionality including impact to chat/team creation and search.
• Users experienced issues with connectors/flows in the Microsoft Power Platform and logic apps.
• Users received 500 errors and were unable to access the Purview service.
Scope of impact
Any user attempting to access or use the services and features outlined within the 'More info' section of this communication were impacted.
Root cause
A recent update to our authentication systems contained a code issue, resulting in impact.
Next steps
• We're reviewing our change management process to better understand how the impacting change was not detected in our testing cycle.
• We're reviewing all related service telemetry as we work to produce a post-incident report.
We'll produce a preliminary post-incident report in two business days, and a final post-incident report in five business days.
Monitoring
Microsoft has indicated their fix seems to be working; they will continue to monitor the affected services. Here is their full message:
Current status: We've confirmed that reverting the impacting service update has returned the service to a healthy state. We’ve entered a period of extended monitoring to ensure that the service remains stable, and to address any outstanding impact to other Microsoft 365 services.
Current status: We've confirmed that reverting the impacting service update has returned the service to a healthy state. We’ve entered a period of extended monitoring to ensure that the service remains stable, and to address any outstanding impact to other Microsoft 365 services.
Identified
Microsoft has shared the following update:
We've identified a recent code change to a portion of service infrastructure that we suspect is causing impact. We've reverted the code change, and we're monitoring service health telemetry to confirm if the reversion is returning service to expected functionality.
Next update by: Saturday, March 1, 2025 at 6:00 PM EST
We've identified a recent code change to a portion of service infrastructure that we suspect is causing impact. We've reverted the code change, and we're monitoring service health telemetry to confirm if the reversion is returning service to expected functionality.
Next update by: Saturday, March 1, 2025 at 6:00 PM EST
Investigating
We are aware of an issue preventing users from accessing Exchange Online services, including email and calendar. This appears to impact multiple connection methods, including Outlook apps, Outlook on the web, and built-in Mail and Calendar apps on Apple and Android devices.
At this time, Microsoft has not officially acknowledged the issue, but reports indicate it is affecting users globally, not just those at Ohio University.
What You Need to Know:
Impacted Services: Exchange Online (Email & Calendar)
Affected Platforms: Outlook apps, Outlook on the web, built-in Mail and Calendar apps on Apple and Android
Current Status: Investigation ongoing; waiting for Microsoft confirmation
Next Update: We will provide further details as soon as more information is available
At this time, Microsoft has not officially acknowledged the issue, but reports indicate it is affecting users globally, not just those at Ohio University.
What You Need to Know:
Impacted Services: Exchange Online (Email & Calendar)
Affected Platforms: Outlook apps, Outlook on the web, built-in Mail and Calendar apps on Apple and Android
Current Status: Investigation ongoing; waiting for Microsoft confirmation
Next Update: We will provide further details as soon as more information is available
This incident affected: Email & Calendar (Catmail calendar, Email, Mailing Lists, Mass Mailings, Shared Mailboxes & Calendars).