Sterling IT

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 initial 10% of the deployment has saturated throughout the affected infrastructure and has proven successful. We’re now in the process of deploying another 40% of the fix while we continue monitoring service health. Additionally, we expect that some users may be incrementally remediated as the deployment continues to saturate throughout the affected environment. 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. This information may be updated as our investigation continues. 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: Sunday, September 20, 2026, at 3:00 AM UTC

A fix has been implemented and we are monitoring the results.

Title: Some users may intermittently be unable to launch Microsoft Teams from the web or desktop clients User impact: Users may intermittently be unable to launch Microsoft Teams from the web or desktop clients. Current status: We've confirmed that the issue is associated with a recent build update and have expanded our mitigation efforts by rolling affected deployments back to a last-known-good build. We've also implemented measures to prevent further rollout of the affected update while we continue monitoring service health and validating the effectiveness of the mitigation. Scope of impact: Your organization is affected by this event, and some users may intermittently be unable to launch Microsoft Teams from the web or desktop clients. This information may be updated as our investigation continues. Start time: Wednesday, September 16, 2026, at 3:00 AM UTC Root cause: A recent update introduced an issue affecting a component responsible for launching the app, resulting in the impact. Next update by: Friday, September 18, 2026, at 6:30 AM UTC