Zoho Books administrators can now introduce improved role based access for their users by refining what their external users, e.g. customers and accountants, and also their accounting team members can access.
So for example you could set up roles for supplier & purchases access only, sales access only, external accountant access only, customer access only, e.g. view only invoices and cash payments, and reports only access.
The following screen prints demonstrates the improved role based access.