Likely this can be done with a SIP profile. If you provide a little more details on what exactly you want to achieve, with the SIP dialogue that you want to modify and the specifics on what you’d want to do, it’s easier for us to help you out with this.
This is a great question, my suggestion would be that you test it out as very likely what you are asking about is a slightly narrow corner use case that isn’t that common. So likely it’s not many that could answer this for you. That said, I think that you’re wrong about this, you can absolutely use a copy-list to modify a different field that the source of the copy. The difference as I read it in your comment is to do it in another message in the same dialogue. That part is the unknown that it’s best if you where to test or if you share the whole SIP dialogue as I wrote in my first response then we can test it out ourselves in the SIP profile test tool.
Instead of arguing with someone who tries to help you maybe it would be more productive if you were to actually try to do it as suggested and see what happens. Do you have any actual evidence that it would not work with a copy in a SIP profile?
It’s semantics IMHO. In my opinion you’re arguing, you can see it as you’d like, it’s after all a free world. I hope that you get the help you seek. I’ll be dropping off this post as I don’t appreciate your tone and verbiage.
