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AZ-802 · Monitoring and troubleshooting · Monitoring and troubleshooting | Troubleshoot Active Directory

Practice question 459 of 506 · easy

A service ticket request reports KDC_ERR_PRINCIPAL_NOT_UNIQUE. What should be investigated?

Choose the single best answer.

  1. A.Only expiration of an otherwise unique cached service ticket
  2. B.Duplicate or ambiguous SPN registrations
  3. C.Assume this specifically proves the service principal is completely missing
  4. D.Only the usual clock-skew tolerance
Show the answer and explanation

✓ Correct answer

  • Duplicate or ambiguous SPN registrations

The non-unique principal error points to ambiguous registrations. Ticket expiry and time skew cause different failures; a completely missing principal instead aligns with a principal-unknown error.

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