Add contact opt-in check box in help center ticket creation form

Add contact opt-in check box in help center ticket creation form

Hello,

Today, contact are added thanks to external authentication from our internal home made site.

Thus they access the help center and their contact information are pushed to the CRM.

We would like to add an opt-in check box at some point in the process so that we can send emailing campaigns to this new contacts in CRM.

We thought that we could add this opt-in checkbox when contacts are creating ticket. But I only find options to add ticket custom fields, not contact custom fields, in the ticket creation form.

Can you please advise?

Thanks,

Leonard