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TAPI_E_CALLCENTER_NO_AGENT_ID
What TAPI_E_CALLCENTER_NO_AGENT_ID means
TAPI_E_CALLCENTER_NO_AGENT_ID The agent was created without an explicit agent identifier. Operations that require an ID cannot use an object created only with CreateAgent.
What to check
- Identify where the agent object was constructed and whether CreateAgent or CreateAgentWithID was used.
- Verify the authoritative agent ID expected by the ACD system instead of deriving one from display text or login name.
- Make sure the object was not cached from an earlier anonymous-agent workflow.
Handling
Create the agent with CreateAgentWithID when the operation requires a stable agent ID, then reacquire any dependent call-center objects.
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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