Your question is Troubleshooting Cross-Platform Access Failures. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you had to troubleshoot a complex permissions issue involving Linux systems authenticating against Active Directory or another centralized identity service. Walk me through how you diagnosed the problem, how you coordinated with others if ownership was unclear, and what the outcome was.