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0D5WR00001JFwvI0ATOkta Classic EngineAuthenticationAnswered2026-02-27T17:10:00.000Z2026-02-19T09:42:18.000Z2026-02-27T17:10:00.000Z

JamanR.83920 (Customer) asked a question.

IDP certificate expired but still Authentication works

we have IDP federation with our partner organization to whom we grant access to our application. Partner organization'S IDP certificate is showing expired in Okta but when searched the IDP log, user's are still able to authenticate. Isn't authentication should stop once its expired?


  • Paul S. (Okta, Inc.)

    Hello @JamanR.83920 (Customer)​  Thank you for posting on our Community page!

     

    There could be a number of reasons why the configuration will still work even if the certificate is expired:

    • As long as the incoming SAML assertion is signed by any certificate currently trusted in the configuration, authentication succeeds.
    • The Request Signature option in the IDP settings is unchecked
    • If in the SAML assertion it is the same certificate regardless if the expiration date is pass due.

     

    Thank you for reaching out to our Community and have a great day!

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  • Paul S. (Okta, Inc.)

    Hello @JamanR.83920 (Customer)​  Thank you for posting on our Community page!

     

    There could be a number of reasons why the configuration will still work even if the certificate is expired:

    • As long as the incoming SAML assertion is signed by any certificate currently trusted in the configuration, authentication succeeds.
    • The Request Signature option in the IDP settings is unchecked
    • If in the SAML assertion it is the same certificate regardless if the expiration date is pass due.

     

    Thank you for reaching out to our Community and have a great day!

    --

    Help others in the community by liking or hitting Select as Best if this response helped you.

    Expand Post
    Selected as Best
  • EricV.70654 (Customer)

    SAML itself does not explicitly require expiry checking, but implementations that perform full X.509 path validation per PKIX standards must enforce certificate validity periods. Some vendors choose simplified trust validation models that do not enforce expiration.

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IDP certificate expired but still Authentication works