Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users

Title: Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users User impact: Users may have been unable to create or publish Microsoft Teams town hall or webinar events that included guest users. Final status: We've corrected our fix, deployed it to the affected environment, and confirmed internally that impact is remediated Scope of impact: Impact was specific to some users attempting to create or publish Microsoft Teams town hall or webinar events that included guest users. Start time: Tuesday, July 28, 2026, at 4:02 PM UTC End time: Wednesday, July 29, 2026, at 9:30 PM UTC Root cause: A recent service update contained a code regression, which resulted in impact. Next steps: We're reviewing and improving our service update validation procedure to detect and prevent similar code issues in future updates. This is the final update for this event.

Title: Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users User impact: Users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users. Current status: We've completed the validation of our fix and started deployment to a subset of the affected environment, although the deployment failed to initiate as expected. We're working to address the issues preventing our deployment from initiating so that we can apply our fix and remediate impact as soon as possible. Scope of impact: Impact is specific to some users attempting to create or publish Microsoft Teams town hall or webinar events that include guest users. Start time: Tuesday, July 28, 2026, at 4:02 PM UTC Root cause: A recent service update contains a code regression, which is resulting in impact. Next update by: Thursday, July 30, 2026, at 6:30 PM UTC

Title: Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users User impact: Users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users. Current status: We're in the final stages of validating the fix and expect to share a validation completion timeline as part of our next update. Once completed, we'll test the fix to confirm it resolves impact and then proceed with deployment across all affected environments. Scope of impact: Impact is specific to some users attempting to create or publish Microsoft Teams town hall or webinar events that include guest users. Start time: Tuesday, July 28, 2026, at 4:02 PM UTC Root cause: A recent standard service update contains a code regression, which is resulting in impact. Next update by: Wednesday, July 29, 2026, at 6:30 PM UTC

Title: Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users User impact: Users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users. Current status: We're continuing to validate the fix prior to deployment to ensure it successfully resolves the impact. Scope of impact: Impact is specific to some users attempting to create or publish Microsoft Teams town hall or webinar events that include guest users. Start time: Tuesday, July 28, 2026, at 4:02 PM UTC Root cause: A recent standard service update contains a code regression, which is resulting in impact. Next update by: Wednesday, July 29, 2026, at 2:30 PM UTC

Title: Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users User impact: Users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users. Current status: We've determined that a recent standard service update inadvertently contains a code regression, which is resulting in impact. We've developed a fix and are validating it prior to deployment. Scope of impact: Impact is specific to some users attempting to create or publish Microsoft Teams town hall or webinar events that include guest users. Start time: Tuesday, July 28, 2026, at 4:02 PM UTC Root cause: A recent standard service update inadvertently contains a code regression, which is resulting in impact. Next update by: Wednesday, July 29, 2026, at 11:30 AM UTC

Title: Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users User impact: Users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users. Current status: We're reviewing service monitoring telemetry to isolate the source of the issue and establish a fix. Scope of impact: Impact is specific to some users attempting to create or publish Microsoft Teams town hall or webinar events that include guest users. Next update by: Wednesday, July 29, 2026, at 9:30 AM UTC