Let’s say users A and B are having a private conversation and one of them adds user C.
Is this action stored in a table or report?
I would like to be able to know if it was user A or user B who added user C.
The reason why I’m asking is that user C wasn’t aware that this was happening (he thought he was sending a PM to user A).
Is there any way that the PMs from B to A and from C to A could have gotten merged because they both had the same subject? 
I don’t think it works that way. messages are identified based on their ID not on their subject.
If I invite a user to a PM, there is this big, bold action added
Thanks. I think I figured it out. User A moved a message from User C to a PM between A and B, which automatically added User C as a conversation recipient. 
I’m still wondering if that information was added somewhere
You’ll have to snoop into their conversation I guess. I don’t know if it is logged anywhere else.
