Incident Summary
On January 15, 2026 06:45–07:15 UTC, a subset of customers hosted on the EU1 deployment in the EMEA region experienced a degradation in authentication services. The event primarily manifested as intermittent authentication disruption, with the majority of affected tenants experiencing impact for less than 40 minutes.
Core platform availability remained operational throughout the event. Most customers were able to authenticate successfully during the impact window, though some authentication flows experienced slower-than-normal response times and elevated failure rates for a limited period. Service behavior returned to normal once mitigation actions were applied.
Root Cause
A January service update introduced a flaw in our upgrade handling which caused some clients to unnecessarily retrieve application resources, creating unexpected request patterns within the authentication flow. This behavior disrupted normal request patterns within the authentication flow and contributed to authentication disruption for a subset of customers.
In addition, notifications on the status page occurred later than expected. During the incident, overall service availability remained operational, and the impact presented as intermittent authentication disruption rather than a sustained outage condition. Because successful authentications continued throughout the incident window for most customers, initial indicators aligned with a limited disruption scenario. Customer communication was issued as impact scope was confirmed.
Mitigation and Recovery Actions
During the incident, the following actions were taken:
These actions successfully stabilized the environment. No recurrence has been observed since mitigation was applied.
Corrective and Preventive Actions
The following actions are under evaluation or implementation: