How To Fix SAML2099 - System expected one of the digest algorithms: &1, but received &2

SAML2099 - Overview

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 099

• Message text: System expected one of the digest algorithms: &1, but received &2

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.

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SAML2099 - Details

• The SAP error message SAML2099 indicates a mismatch between the expected and received digest algorithms during a SAML (Security Assertion Markup Language) authentication process. This error typically occurs when the system is configured to accept specific digest algorithms, but the incoming SAML assertion uses a different algorithm.
  
  Cause:
  The error message specifies that the system expected one of the specified digest algorithms (e.g., SHA-1, SHA-256) but received a different one. This can happen due to several reasons:
  
  Configuration Mismatch: The Identity Provider (IdP) is configured to use a different digest algorithm than what the Service Provider (SP) is expecting.
  Outdated Configuration: The SP may have an outdated configuration that does not support newer digest algorithms.
  SAML Assertion Issues: The SAML assertion being sent by the IdP may be incorrectly configured or generated with an unsupported algorithm.
  
  
  Solution:
  To resolve the SAML2099 error, you can take the following steps:
  
  
  Check Configuration:
  
  Verify the digest algorithms configured in both the IdP