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SEC_I_COMPLETE_NEEDED
SEC_I_COMPLETE_NEEDED is a successful SSPI progress status which says that the current token must be completed with CompleteAuthToken before the negotiation can be considered complete.
Why it is different from another handshake round
The token is already produced, but the security package requires a final package-specific update after the transport application has finalized message parameters. Microsoft documents CompleteAuthToken for the Digest SSP; applications should follow this status only when returned by the selected package.
What to check
- Keep the context and token buffers alive until completion has returned.
- Preserve the exact token passed to the completion step; do not rebuild it from text or partial fields.
- Do not treat this status as a failure or retry the original call with unrelated input.
Microsoft: CompleteAuthToken · SSPI Status Codes
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