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MQ_ERROR_INTERNAL_USER_CERT_EXIST
MQ_ERROR_INTERNAL_USER_CERT_EXIST: an MSMQ internal certificate already exists for the current user
MQ_ERROR_INTERNAL_USER_CERT_EXIST (0xC00E002E) identifies a specific boundary: an MSMQ internal certificate already exists for the current user. Keep it separate from neighboring errors that may occur in the same product but represent a different lookup, state, trust, or transport decision.
Evidence to capture
Capture user SID, existing MSMQ certificate identity/thumbprint, certificate-store location, and the operation attempting to create another internal certificate. This is a duplicate-state condition, not certificate absence.
Corrective test
Reuse or deliberately replace the existing certificate through MSMQ-supported administration; verify the user has exactly the intended certificate after the operation. Preserve the original identifiers while testing; if another HRESULT appears after this boundary is fixed, treat that value as the next-stage result.
Technical references
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