zoho.desk.update doesn't change 'reply to' when changing Contact

zoho.desk.update doesn't change 'reply to' when changing Contact

I have a creator script that sends a Form to Desk for stuff like setting up new employees etc..
Due to new email restrictions, we can no longer fake the 'from' address so it must come from one of our emails, like 'support@domain.com'.

So I developed a script that would get the submitters email address, and use the 'zoho.desk.update' function to change the ticket 'owner'

However in Zoho Desk, when we reply to the ticket- it still has the original ''support@domain.com' email address, not the new owners email.

How can I fix this please?