Build 8223

I have a situation where a meeting was created on 7/13/22 for 8/10/22. Messages to users was sent out on 7/13/22. Yesterday, 8/13/22 the same message was sent out again for the meeting scheduled for 8/10/22. I am unable to determine from the messages, the calendar entry, or any of the logs I searched through, how the original meeting was scheduled. I don't know what device, what client app, what ip address, etc.

In looking for this info I noticed SmarterMail apparently doesn't record that info on any message that is created by an authenticated user. Any message I open from an internal user doesn't show that info in the header. Where can I find that sort of connection info for local users? I'm trying to figure out if some client actually resent/recreated the meeting thereby generating the duplicate messages but there isn't sufficient data to identify the source specifics. Any suggestions on how to proceed? This particular issue has apparently been occurring without my knowledge and is now being used as evidence against SmarterMail as a reliable email platform. Yes, there is a revolt underway and decision makers are affected and applying pressure. Which makes the inability to track messages in the system even more troubling.