When attempting to log into the 3DEXPERIENCE Public SAAS platform, users might encounter a 400 Bad Request error. This issue generally arises when the platform is unable to accurately match user credentials, resulting in denied access to the system.

• 3DEXPERIENCE Public SAAS
• Custom SAML 2.0

The error typically stems from a misconfiguration in the SAML attributes statement. If essential attributes like Country, Email, FirstName, LastName, and UserName are not appropriately defined or are missing, the user login process encounters a mismatch, leading to the "400 Bad Request" error.

1. Reach out to the Service Provider (SP) Support to review the current configuration.
2. Determine the requisite attributes needed for a successful login. These generally include: Country, Email, FirstName, LastName, and UserName.
3. Update the Custom SAML Application attributes statement to accurately reflect these attributes.
4. Conduct a system test to confirm that users are correctly matched and can successfully log in.