When I customize iNotes using an $$QuerysaveAgent for the Appointment form the agent is never executed on new documents. The agent is only executed on document edits.I Never tested on other forms, but for meetings you cannot use the custom Querysave agent.
If somebody knows a workaround let me know!
Tested on Linux/Windows 2k3 with Domino 8.5 and 8.5.1