Resolved after 1 hour 16 minutes, affecting North America - Canada (Addin) and Europe - France (Addin) and 1 more, on October 15, 2026.
The incident affecting authentication for the Letsignit Outlook Add-in has been resolved. The issue was caused by the rollout of an additional security layer that unexpectedly generated excessive load on our authentication services, leading to authentication failures and degraded performance for some users. To restore service, we rolled back the change and authentication is now operating normally. We remain committed to strengthening our security posture and will continue working on this enhancement before reintroducing it through a more gradual and thoroughly validated deployment process. We apologize for the disruption and thank you for your patience.
Affected components
Update timeline
- identified Oct 15, 2026, 07:07 AM UTC
We are currently experiencing an issue affecting authentication for the Letsignit Outlook Add-in. Users may encounter sign-in failures, preventing access to the add-in. Our engineering team is actively investigating the issue and working on a resolution. We apologize for the inconvenience and will share updates as soon as we have more information.
- resolved Oct 15, 2026, 08:23 AM UTC
The incident affecting authentication for the Letsignit Outlook Add-in has been resolved. The issue was caused by the rollout of an additional security layer that unexpectedly generated excessive load on our authentication services, leading to authentication failures and degraded performance for some users. To restore service, we rolled back the change and authentication is now operating normally. We remain committed to strengthening our security posture and will continue working on this enhancement before reintroducing it through a more gradual and thoroughly validated deployment process. We apologize for the disruption and thank you for your patience.
- resolved Oct 15, 2026, 08:23 AM UTC
The incident affecting authentication for the Letsignit Outlook Add-in has been resolved. The issue was caused by the rollout of an additional security layer that unexpectedly generated excessive load on our authentication services, leading to authentication failures and degraded performance for some users. To restore service, we rolled back the change and authentication is now operating normally. We remain committed to strengthening our security posture and will continue working on this enhancement before reintroducing it through a more gradual and thoroughly validated deployment process. We apologize for the disruption and thank you for your patience.
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