Status Page

2025-05-05	Status	Description
10:15 AM		EXCHANGE NOTICE Some users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine Service Restored Final status: Following the deployment of the corrected model and resubmission of all email impacted during this event through the corrected model, the service provider's internal telemetry has verified that their ML model configuration changes have remediated the impact. Start time: Sunday, May 4, 2025, at 12:16 PM AST End time: Sunday, May 4, 2025, at 8:20 PM AST
10:00 AM		EXCHANGE NOTICE Some users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine Service Degradation Current status: The service provider has identified via their automated monitoring system an issue with one of their Machine Learning (ML) models, which may be causing potential phishing email messages to be sent to users' Junk folder in Exchange Online instead of quarantine. They've determined this issue was caused by a configuration issue with a specific component with one of their ML models, which is responsible for labelling high-confidence phishing email messages, causing some potential phishing email messages to be sent to the Junk folder instead of being quarantined. They've adjusted and are in the process of deploying the corrected model to resolve the issue.
09:30 AM		EXCHANGE NOTICE Some users’ saved Outlook calendar views may not be preserved Service Restored More info: This issue may have impacted users who were leveraging Outlook on the web, the new Outlook desktop client experience, or those who have the new Calendar enabled in Teams. Final status: The service provider has confirmed the fix deployment has completed to all impacted infrastructure and validated remediation via internal testing. Start time: Thursday, April 3, 2025, at 5:22 PM AST End time: Thursday, May 1, 2025, at 12:00 PM AST
09:00 AM		EXCHANGE NOTICE Some users may experience issues with their Outlook calendar saved views not being preserved Service Degradation User impact: Users may experience issues with their Outlook calendar saved views not being preserved. More info: This issue may impact users in Outlook on the web and New Outlook. In addition, users who have New Calendar enabled in Teams may also be impacted. Current status: We received reports of an issue with Outlook calendar saved views. Our investigation identified a recent service update containing a code issue that's causing the service to incorrectly fail to recognize saved view calendar IDs, leading to impact. We're working to internally test and develop a fix for this issue to remediate impact. Scope of impact: Users may be impacted by this event experience issues with their Outlook calendar saved views not being preserved. Start time: Thursday, April 3, 2025, at 8:22 PM UTC Root cause: A recent service update contained a code issue that's causing the service to incorrectly fail to recognize saved view calendar IDs, leading to impact. Next update by: Friday, April 18, 2025, at 7:00 PM UTC

10:15 AM

EXCHANGE NOTICE
Some users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine
Service Restored

Final status: Following the deployment of the corrected model and resubmission of all email impacted during this event through the corrected model, the service provider's internal telemetry has verified that their ML model configuration changes have remediated the impact.

Start time: Sunday, May 4, 2025, at 12:16 PM AST
End time: Sunday, May 4, 2025, at 8:20 PM AST

10:00 AM

EXCHANGE NOTICE
Some users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine
Service Degradation

Current status: The service provider has identified via their automated monitoring system an issue with one of their Machine Learning (ML) models, which may be causing potential phishing email messages to be sent to users' Junk folder in Exchange Online instead of quarantine. They've determined this issue was caused by a configuration issue with a specific component with one of their ML models, which is responsible for labelling high-confidence phishing email messages, causing some potential phishing email messages to be sent to the Junk folder instead of being quarantined. They've adjusted and are in the process of deploying the corrected model to resolve the issue.

09:30 AM

EXCHANGE NOTICE
Some users’ saved Outlook calendar views may not be preserved
Service Restored

More info: This issue may have impacted users who were leveraging Outlook on the web, the new Outlook desktop client experience, or those who have the new Calendar enabled in Teams.
Final status: The service provider has confirmed the fix deployment has completed to all impacted infrastructure and validated remediation via internal testing.

Start time: Thursday, April 3, 2025, at 5:22 PM AST
End time: Thursday, May 1, 2025, at 12:00 PM AST

09:00 AM

EXCHANGE NOTICE
Some users may experience issues with their Outlook calendar saved views not being preserved
Service Degradation

User impact: Users may experience issues with their Outlook calendar saved views not being preserved.
More info: This issue may impact users in Outlook on the web and New Outlook.
In addition, users who have New Calendar enabled in Teams may also be impacted.
Current status: We received reports of an issue with Outlook calendar saved views. Our investigation identified a recent service update containing a code issue that's causing the service to incorrectly fail to recognize saved view calendar IDs, leading to impact. We're working to internally test and develop a fix for this issue to remediate impact.
Scope of impact: Users may be impacted by this event experience issues with their Outlook calendar saved views not being preserved.
Start time: Thursday, April 3, 2025, at 8:22 PM UTC
Root cause: A recent service update contained a code issue that's causing the service to incorrectly fail to recognize saved view calendar IDs, leading to impact.
Next update by: Friday, April 18, 2025, at 7:00 PM UTC