Problem - cant add Users (i.e. Zoho one / CRM Users) to BCC or CC in email, i.e. Sales orders or Retainers

Problem - cant add Users (i.e. Zoho one / CRM Users) to BCC or CC in email, i.e. Sales orders or Retainers

I can go to zoho books email templates, and select any email template, and automatically include any Zoho One user, i.e. member of staff.

However in the context of sending an email, it will not let us add a member of staff from the user list, instead it wants us to create a contact.

In our use case, we copy in the relevant internal people for a client's email.  This varies from client to client.