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EU Platform - Disruption — 29 June 2026

App Server upgrade & Monitoring changes

Summary

On 29 June 2026, following a round of planned App Server upgrades and the rollout of additional performance and stability monitoring, some customer libraries that use single sign-on (SSO/SAML) experienced problems signing in and could not access their library. The disruption was limited to libraries using SSO; libraries using standard username/password login were unaffected, and users who were already signed in kept their access as long as their sessions were valid. We traced the cause to newly deployed monitoring software interfering with the SSO sign-in process in an unexpected way. Once identified, this was corrected and SSO sign-in was fully restored. No data was affected.

Impact

  • Scope: Customer libraries using single sign-on (SSO/SAML). Libraries using standard username/password login were not affected.
  • Symptom: On attempting to sign in via SSO, users were redirected to an error page. Users with an existing active session were generally unaffected.
  • Window: Intermittent from ~ 08:00 CET to ~12:00 CET following the App Server upgrades carried over the weekend of 27–28 June 2026.
  • Cause: Newly deployed performance/stability monitoring software interfered with the SSO authentication handshake, preventing a new session from being established (sign-in loop).

Why we were making changes

The App Server upgrades and the additional performance and stability monitoring were planned improvements to keep the platform fast, reliable, and well-instrumented. The impact on SSO sign-in was an unintended and unforeseen side effect of the monitoring deployment, not the upgrades themselves.

Resolution

Once the interference was identified, we first tried to resolve the issue. To limit impact we eventually made the decision to switch the Application Server to the original (pre-upgrade) Host while we investigated, at which time the service was fully restored. We have since adjusted the monitoring configuration on all affected servers and have been running further testing and validation of SSO sign-ins.

No further action is required by users, and no data was affected. BusinessOptix apologises for any inconvenience and will provide more pro-active notices regarding future changes, even in some cases where they should be transparent to users.