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SEC_E_QOP_NOT_SUPPORTED
SEC_E_QOP_NOT_SUPPORTED signals this condition: The requested per-message Quality of Protection is not supported by the security package. SSPI supports different protection properties depending on the package and negotiated context. The application asked for a protection level that the active package cannot provide.
What to check
- Determine whether the application requested signing, encryption, sequencing, or another QOP attribute.
- Verify the package actually negotiated and the final context attributes returned by SSPI.
- Change the application request only when the security requirements have been reviewed; do not silently weaken protection to suppress the error.
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