Nicole Saunders

Hi I am new to this system and I have run in to one big problem. We are forwarding emails in to our WHMCS. I then need to change the client email that is attached to the ticket (the email we respond to) to a different email, however so far it looks like I can only change it to a CLIENT. I have tested creating a contact under the client, then I gave that contact a sub-account. Neither could be assigned to the support ticket. But I do NOT want to have to create every email address as a CLIENT account. Can someone advise how I am meant to go about changing the email address associated to the ticket or what workaround there is?