How to Fix SAML Signature Validation Failed Login Errors in Adobe Acrobat
Question details
Users encounter a SAML signature validation failed error when attempting to log into Adobe Acrobat using enterprise single sign-on (SSO).
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Attempting to sign in to the application using enterprise Single Sign-On (SSO).
- Observed behavior
- The login attempt fails, displaying a SAML signature validation failed error message and preventing access to the software.
Ensure you have administrative access to your organization's Identity Provider (IdP) dashboard, as resolving this issue requires verifying SSO metadata and certificates.
Verify and Update Identity Provider (IdP) Metadata and Certificates
Update the SAML signing certificate and ensure the IdP metadata matches the service provider's expectations to resolve signature validation failures.
This error typically occurs when the signing certificate used by your organization's Identity Provider has expired or the metadata is out of sync with Adobe's Admin Console.
Sign in to your Identity Provider (IdP) administration portal (e.g., Azure AD, Okta, PingIdentity) with administrator credentials.
Navigate to the Single Sign-On or SAML configuration settings for Adobe Acrobat and check the expiration date of the current SAML signing certificate. If expired, generate a new one.
Download the new IdP metadata XML file, which contains the updated public key and signing certificate.
Log into the Adobe Admin Console, navigate to your directory's SSO settings, and upload the new metadata file or certificate to synchronize the configuration.
Contact Your Organization's IT Administrator
If you are an end-user without administrative access, you must escalate the SSO failure to your internal IT department.
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Frequently Asked Questions
What causes a SAML signature validation failure?
This error typically occurs when the SAML response sent by the Identity Provider (IdP) is signed with an expired certificate, or the certificate uploaded to the Service Provider does not match the one actively used by the IdP.
Can an end-user fix a SAML SSO login error?
Usually, no. SAML and Single Sign-On configurations are managed at the organizational level. End-users experiencing this issue must contact their IT department or system administrator to resolve the underlying certificate mismatch.
How often do SAML signing certificates expire?
SAML signing certificates typically have a lifespan of 1 to 3 years, depending on the security policies set by your Identity Provider. IT administrators must manually rotate these certificates before they expire to prevent unexpected login interruptions.
