Some users may have been unable to schedule Microsoft Teams meetings through the classic Outlook desktop client

Title: Some users may have been unable to schedule Microsoft Teams meetings through the classic Outlook desktop client User impact: Users may have been unable to schedule Microsoft Teams meetings through the classic Outlook desktop client. More info: Impact was specific to Microsoft Teams version 26149.1205.4798.6437. The Teams Meeting add-in appeared to have been installed and enabled in classic Outlook; however, it wasn't being displayed, preventing affected users from scheduling Teams meetings directly from the Outlook ribbon. Final status: We've confirmed that the deployment has successfully completed and validated through service health telemetry that the issue has been resolved and impact no longer persists. Scope of impact: Users on Microsoft Teams version 26149.1205.4798.6437 and attempting to create and schedule Microsoft Teams meetings through the classic Outlook desktop client may have been impacted. Start time: Monday, June 22, 2026, at 1:16 AM UTC End time: Thursday, July 9, 2026, at 12:45 PM UTC Root cause: A recent service update introduced an incompatibility affecting how the Teams Meeting add-in identified the appropriate Teams client during initialization in newly configured Outlook environments impact, resulting in impact. Next steps: We're reviewing our update procedures to better identify similar issues during our development and testing cycles. This is the final update for the event.

Title: Some users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client User impact: Users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client. More info: Impact is specific to Microsoft Teams version 26149.1205.4798.6437. The Teams Meeting add-in appears to be installed and enabled in classic Outlook; however, it isn't being displayed, preventing affected users from scheduling Teams meetings directly from the Outlook ribbon. Users that have access to the new Outlook client or Microsoft Teams desktop or web apps can use these to schedule Microsoft Teams meetings and bypass the impact while we're focused on addressing the impact caused by this event. Current status: We've deployed the fix to the majority of the affected environments and, due to unforeseen delays, we're expecting the fix to be deployed by Friday, July 10, 2026. Scope of impact: Users on Microsoft Teams version 26149.1205.4798.6437 and attempting to create and schedule Microsoft Teams meetings through the classic Outlook desktop client may be impacted. Estimated time to resolve: Friday, July 3, 2026 Root cause: A recent service update introduced an incompatibility affecting how the Teams Meeting add-in identifies the appropriate Teams client during initialization in newly configured Outlook environments impact, resulting in impact. Next update by: Friday, July 10, 2026, at 11:00 AM UTC

Title: Some users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client User impact: Users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client. More info: Impact is specific to Microsoft Teams version 26149.1205.4798.6437. The Teams Meeting add-in appears to be installed and enabled in classic Outlook; however, it isn't being displayed, preventing affected users from scheduling Teams meetings directly from the Outlook ribbon. Users that have access to the new Outlook client or Microsoft Teams desktop or web apps can use these to schedule Microsoft Teams meetings and bypass the impact while we're focused on addressing the impact caused by this event. Current status: We're continuing to expect that the deployment will be complete by the end of Friday, July 3, 2026. Following deployment, we will closely monitor the affected environments over an extended period to confirm that impact has been fully resolved. Scope of impact: Users on Microsoft Teams version 26149.1205.4798.6437 and attempting to create and schedule Microsoft Teams meetings through the classic Outlook desktop client may be impacted. Estimated time to resolve: Friday, July 3, 2026 Root cause: A recent service update introduced an incompatibility affecting how the Teams Meeting add-in identifies the appropriate Teams client during initialization in newly configured Outlook environments impact, resulting in impact. Next update by: Monday, July 6, 2026, at 11:00 AM UTC

Title: Some users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client User impact: Users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client. More info: Impact is specific to Microsoft Teams version 26149.1205.4798.6437. The Teams Meeting add-in appears to be installed and enabled in classic Outlook; however, it isn't being displayed, preventing affected users from scheduling Teams meetings directly from the Outlook ribbon. Users that have access to the new Outlook client or Microsoft Teams desktop or web apps can use these to schedule Microsoft Teams meetings and bypass the impact while we're focused on addressing the impact caused by this event. Current status: We're progressing with deploying the fix, and the deployment is expected to complete by Friday, July 3, 2026. Scope of impact: Users on Microsoft Teams version 26149.1205.4798.6437 and attempting to create and schedule Microsoft Teams meetings through the classic Outlook desktop client may be impacted. Estimated time to resolve: Friday, July 3, 2026 Root cause: A recent service update introduced an incompatibility affecting how the Teams Meeting add-in identifies the appropriate Teams client during initialization in newly configured Outlook environments impact, resulting in impact. Next update by: Friday, July 3, 2026, at 10:30 AM UTC

Title: Some users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client User impact: Users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client. More info: Impact is specific to Microsoft Teams version 26149.1205.4798.6437. The Teams Meeting add-in appears to be installed and enabled in classic Outlook; however, it isn't being displayed, preventing affected users from scheduling Teams meetings directly from the Outlook ribbon. Users that have access to the new Outlook client or Microsoft Teams desktop or web apps can use these to schedule Microsoft Teams meetings and bypass the impact while we're focused on addressing the impact caused by this event. Current status: We've identified and outlined a method in the More info section of this communication to bypass the impact by utilizing the new Outlook client or Microsoft Teams desktop and web apps, and we've updated the More info section of this communication with this information. We're continuing to deploy our fix, and we expect to have an update on its progress by our next communication update. Scope of impact: Users on Microsoft Teams version 26149.1205.4798.6437 and attempting to create and schedule Microsoft Teams meetings through the classic Outlook desktop client may be impacted. Root cause: A recent service update introduced an incompatibility affecting how the Teams Meeting add-in identifies the appropriate Teams client during initialization in newly configured Outlook environments impact, resulting in impact. Next update by: Wednesday, July 1, 2026, at 10:30 AM UTC

Title: Some users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client User impact: Users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client. More info: Impact is specific to Microsoft Teams version 26149.1205.4798.6437. The Teams Meeting add-in appears to be installed and enabled in classic Outlook; however, it isn't being displayed, preventing affected users from scheduling Teams meetings directly from the Outlook ribbon. Current status: We've determined that a recent service update introduced an incompatibility affecting how the Teams Meeting add-in identifies the appropriate Teams client during initialization in newly configured Outlook environments. As a result, the add-in may fail to load, preventing affected users from scheduling Microsoft Teams meetings through Outlook. We've developed a fix to address this behavior and are working to expedite its deployment. To limit additional exposure, we've stopped further rollout of the affected change while we progress deployment activities for the updated fix. Based on our current estimates, we anticipate that the fix will be available by Friday, July 3, 2026. Scope of impact: Users on Microsoft Teams version 26149.1205.4798.6437 and attempting to create and schedule Microsoft Teams meetings through the classic Outlook desktop client may be impacted. Root cause: A recent service update introduced an incompatibility affecting how the Teams Meeting add-in identifies the appropriate Teams client during initialization in newly configured Outlook environments impact, resulting in impact. Next update by: Wednesday, July 1, 2026, at 10:30 AM UTC

Title: Some users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client User impact: Users may be unable to schedule Microsoft Teams meetings through the classic Outlook desktop client. More info: Impact is specific to Microsoft Teams version 26149.1205.4798.6437. The Teams Meeting add-in appears to be installed and enabled in classic Outlook; however, it isn't being displayed, preventing affected users from scheduling Teams meetings directly from the Outlook ribbon. Current status: We're reviewing support case details to determine our next troubleshooting steps. Scope of impact: Users on Microsoft Teams version 26149.1205.4798.6437 and attempting to create and schedule Microsoft Teams meetings through the classic Outlook desktop client may be impacted. Next update by: Wednesday, June 24, 2026, at 10:30 AM UTC