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TAPI_E_BILLINGREJECTED
What TAPI_E_BILLINGREJECTED means
TAPI_E_BILLINGREJECTED The provider rejected the calling-card or other billing information associated with the call.
What to check
- Identify which billing field or account the provider evaluated without logging secrets.
- Verify card/account status and the dialing context in which billing information is valid.
- Check whether a provider-specific prefix or authorization sequence is required.
Handling
Correct the billing credentials or account configuration and create a fresh call attempt. Do not log complete card numbers or authorization secrets while diagnosing it.
References
- Microsoft: TAPI_E constants — official Microsoft documentation used to interpret the HRESULT.
- Microsoft: TAPI 3.1 Reference
- Microsoft: Telephony API interfaces
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