What does HRESULT 0x80320038 (FWP_E_INVALID_AUTH_TRANSFORM) mean?

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An IPsec authentication transform is invalid.

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FWP_E_CALLOUT_NOTIFICATION_FAILED	FWP_E_INVALID_CIPHER_TRANSFORM

FWP_E_INVALID_AUTH_TRANSFORM

FWP_E_INVALID_AUTH_TRANSFORM means an IPsec authentication transform is malformed or contains unsupported values. This is distinct from a peer refusing an otherwise valid proposal.

What to verify for FWP_E_INVALID_AUTH_TRANSFORM

Check the transform identifier, key material requirements, and structure initialization.
Make sure the transform is legal for the chosen IPsec policy and tunnel or transport mode.
Review the final policy after any conversion from higher-level configuration into WFP structures.

Microsoft: WFP error codes

Microsoft: capture IPsec events with netsh wfp

Microsoft: WFP operation

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