LayerCake Technologies

Title: Users may be unable to join Microsoft Teams meetings and see sign-in errors User impact: Users may be unable to join Microsoft Teams meetings and see sign-in errors. More info: Affected users see a sign-in prompt when attempting to join a meeting but clicking "sign-in" on the prompt has no effect. Users can sign-out and sign back in as a temporary mitigation. Current status: Our code fix has nearly completed propagation throughout most of the affected environments and we're continuing to monitor it as it progresses. We anticipate it'll have fully propagated by our next scheduled communications update. Scope of impact: Some users attempting to join Microsoft Teams meetings may be affected by this issue. This information may be updated as our investigation continues. Root cause: A recent change to the authentication flow utilized in the event contained a regression, resulting in this impact. Next update by: Thursday, October 15, 2026, at 5:30 AM UTC

We have validated the fix and are working towards production rollout. The earlier mitigation, which disabled a related feature, remains in effect to limit customer impact. There's no estimated resolution time at this point. We'll share another update when more information is available.

Cloudflare is investigating issues with Workers Cron Triggers. A subset of customers may not being their cron get invoked. We are working to mitigate this problem. More updates to follow shortly.