How To Fix SAML2021 - The validation of message '&1' failed

SAML2021 - Overview

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 021

• Message text: The validation of message '&1' failed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2021 - The validation of message '&1' failed ?

  The SAP error message SAML2021 indicates that there is a failure in the validation of a SAML (Security Assertion Markup Language) message. This error typically occurs in scenarios involving Single Sign-On (SSO) configurations, where SAML assertions are used to authenticate users.
  Causes of SAML2021 Error
  
  
  Invalid Signature: The SAML assertion may have an invalid signature, which means that the assertion cannot be trusted. This could be due to a mismatch between the signing certificate used by the Identity Provider (IdP) and the one configured in the Service Provider (SP).
  
  
  Expired Assertion: The SAML assertion may have expired. Each assertion has a validity period, and if the current time is outside this range, the assertion will be considered invalid.
  
  
  Incorrect Audience: The audience specified in the SAML assertion may not match the expected audience configured in the SAP system.
  
  
  Malformed Assertion: The SAML assertion may be malformed or not conforming to the expected structure, which can