SSE-Engineer Prisma Access Troubleshooting Practice Question
When troubleshooting a Prisma Access deployment using SAML authentication, an administrator notices that users are successfully authenticated by the IdP, but the GlobalProtect client displays an error stating 'Invalid SAML Response: Signature Validation Failed'. What is the most likely root cause?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The IdP signing certificate imported into the Prisma Access authentication profile does not match the active certificate currently used by the IdP.
Signature validation failure indicates a mismatch or expiration of the IdP signing certificate configured in the Prisma Access SAML Identity Provider profile.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The decryption policy is blocking HTTPS traffic to the IdP.
Why it's wrong here
Decryption blocking would prevent the authentication flow from reaching the IdP entirely, rather than producing a signature validation error upon response.
- ✓
The IdP signing certificate imported into the Prisma Access authentication profile does not match the active certificate currently used by the IdP.
Why this is correct
If the IdP rolled over its signing certificate without updating the certificate in Panorama, Prisma Access cannot validate the SAML response signature.
- ✗
The User-ID agent service on Panorama has crashed.
Why it's wrong here
User-ID agents do not handle SAML signature verification.
- ✗
The GlobalProtect client version is outdated and does not support SAML.
Why it's wrong here
Outdated clients fail to initiate SAML, but once a response is received, signature validation is a cryptographic check on the firewall/gateway side.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Palo Alto Networks exam blueprint
This SSE-Engineer practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SSE-Engineer exam.