Our agents have multiple email address they use and emails from customers can come in on any one of them. All are set up in all of our Zoho products including Desk. We have to set one of them as default. The issue is if we forward from any email other than the default one the forward attribution fails.

Is this by design or is it a bug? Should a forward from any of the authorized email addresses for an agent work to forward with. 

I have tested this quite a bit but have not found a solution.