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TPMAPI_E_ACCESS_DENIED
TPMAPI_E_ACCESS_DENIED is a Windows TPM API result. It indicates that the current security context is not authorized to perform the requested TPM API operation.
What to check for TPMAPI_E_ACCESS_DENIED
- Confirm the account, elevation state, local security policy, and application service identity.
- Check whether the operation requires device ownership, administrator privileges, or a policy-approved caller.
- Do not work around the restriction by weakening TPM or platform security policy.
Microsoft documentation for TPMAPI error codes
Diagnostic discriminator: Check the caller security context and access required for the exact TPM API operation. This result is authorization at the API boundary, not a malformed TPM command payload.
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