Customer: Meridian SystemsProduct: SSO
SSO authentication fails after identity provider certificate rotation
mediumproductionawaiting decision
Demo case · Fictional data
- Reported
- 11 Sep 2026, 10:20
- Updated
- 11 Sep 2026, 10:44
Investigation summary
Issue description
SSO authentication began failing for some users after an identity provider certificate rotation. Customer suspects the rotation or related IdP configuration, but has not confirmed whether this is a configuration issue or…
Expected behaviour
SSO authentication should succeed for authorised users after a valid IdP certificate rotation.
Actual behaviour
SSO authentication fails for some users after the identity provider certificate rotation.
- Confirmed the customer recently rotated the IdP signing certificate.
- Asked for the rotation window and affected user samples.
- Requested SAML response / assertion for a failing login.
- Configuration versus product defect is not yet established.
Escalation recommendation
INSUFFICIENT EVIDENCE
- Production impact
- Customer-reported severity
- Troubleshooting documented
Human approval required
An authorised reviewer must approve escalation or choose to continue investigation.