Some users may have been unable to open Google search links from email and Microsoft Teams messages

Title: Some users may have been unable to open Google search links from email and Microsoft Teams messages User impact: Users may have been unable to open Google search links from email and Microsoft Teams messages. More info: Microsoft Defender for Office 365 Safe Links may have blocked the opening of Google search links (URLs), identifying them as malicious. In addition, admins may have received related alerts and incidents in the Microsoft Defender portal and Microsoft Sentinel as a result of these detections. Affected users received the following message when attempting to open the Google search links: "Opening this website might not be safe" Copying the hyperlink and pasting it directly into a browser didn’t bypass the warning. Final status: We've received confirmation that the issue has been successfully resolved. However, some users may continue to experience impact for a limited time while the mitigation propagates through the service infrastructure. Scope of impact: Some users attempting to open Google search links from email and Microsoft Teams messages may have been impacted. Start time: Wednesday, September 2, 2026, at 2:53 AM UTC End time: Wednesday, September 2, 2026, at 10:17 AM UTC Root cause: An inaccurate security classification caused legitimate Google search URLs to be incorrectly identified as malicious, resulting in Microsoft Defender for Office 365 Safe Links blocking access to affected links. Next steps: - We're reviewing our URL reputation classification processes to help prevent similar false-positives in the future. This is the final update for the event.

Title: Some users may be unable to open Google search links from email and Microsoft Teams messages User impact: Users may be unable to open Google search links from email and Microsoft Teams messages. More info: Microsoft Defender for Office 365 Safe Links may block the opening of Google search links (URLs), identifying them as malicious. In addition, admins may receive related alerts and incidents in the Microsoft Defender portal and Microsoft Sentinel as a result of these detections. Affected users receive the following message when attempting to open the Google search links: "Opening this website might not be safe" Copying the hyperlink and pasting it directly into a browser doesn't bypass the warning. Current status: We've corrected the inaccurate security classification, and internal testing indicates that this has successfully resolved the issue. However, some users may continue to experience impact for a limited time while the mitigation propagates through the service infrastructure. We're reaching out to a number of affected users to validate that remediation is complete. Scope of impact: Some users attempting to open Google search links from email and Microsoft Teams messages may be impacted. Start time: Wednesday, September 2, 2026, at 2:53 AM UTC Root cause: An inaccurate security classification is causing legitimate Google search URLs to be incorrectly identified as malicious, resulting in Microsoft Defender for Office 365 Safe Links blocking access to affected links. Next update by: Wednesday, September 2, 2026, at 12:30 PM UTC

Title: Some users may be unable to open Google search links from email and Microsoft Teams messages User impact: Users may be unable to open Google search links from email and Microsoft Teams messages. More info: Microsoft Defender for Office 365 Safe Links may block the opening of Google search links (URLs), identifying them as malicious. In addition, admins may receive related alerts and incidents in the Microsoft Defender portal and Microsoft Sentinel as a result of these detections. Affected users receive the following message when attempting to open the Google search links: "Opening this website might not be safe" Copying the hyperlink and pasting it directly into a browser doesn't bypass the warning. Current status: We've determined that an inaccurate security classification is causing legitimate Google search URLs to be incorrectly identified as malicious, resulting in Microsoft Defender for Office 365 Safe Links blocking access to affected links. We're working to correct the misclassification to remediate impact. Scope of impact: Some users attempting to open Google search links from email and Microsoft Teams messages may be impacted. Start time: Wednesday, September 2, 2026, at 2:53 AM UTC Root cause: An inaccurate security classification is causing legitimate Google search URLs to be incorrectly identified as malicious, resulting in Microsoft Defender for Office 365 Safe Links blocking access to affected links. Next update by: Wednesday, September 2, 2026, at 12:00 PM UTC

Title: Some users may be unable to open Google search links from email and Microsoft Teams messages User impact: Users may be unable to open Google search links from email and Microsoft Teams messages. More info: Microsoft Defender for Office 365 Safe Links may block the opening of Google search links (URLs), identifying them as malicious. In addition, admins may receive related alerts and incidents in the Microsoft Defender portal and Microsoft Sentinel as a result of these detections. Affected users receive the following message when attempting to open the Google search links: "Opening this website might not be safe" Copying the hyperlink and pasting it directly into a browser doesn't bypass the warning. Current status: We're reviewing affected alert IDs for a subset of impacted users, while also analyzing blocked links and their source, to determine why legitimate Google search URLs are being classified as malicious. Scope of impact: Some users attempting to open Google search links from email and Microsoft Teams messages may be impacted. Next update by: Wednesday, September 2, 2026, at 10:30 AM UTC