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TPM_E_KEY_USAGE_POLICY_NOT_SUPPORTED
TPM_E_KEY_USAGE_POLICY_NOT_SUPPORTED means the requested policy type is not implemented for this TPM-backed key or provider configuration.
What to check
- Identify the policy type and compare it with the supported policy capabilities of the Platform Crypto Provider.
- Check whether the required behavior can be implemented with a supported TPM policy or must be enforced by the application or service layer.
- Avoid silently downgrading a security policy; any fallback must be explicit and approved for the workload.
Microsoft: CNG key storage providers
Microsoft: TPM Group Policy settings
Microsoft: TPM and PCP error codes
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