Hi @GarethMurphy ,
Thank you for the elaborate description. A similar solution was proposed before. For some this might be OK. But if for any reason you are for instance sharing files in a meeting these files are available for everyone else that got the invite earlier as well. It can be quite risky to do this.
I had this the other way around. After the call I wanted to review some notes in the chat. I opened the same link as before and I was able to read the full internal chat conversation of our potential client, stating that they liked the product, etc. etc etc. 
.
Regards,
Peter