Is it possible to setup custom functions in Zoho Books for the data synced from Zoho CRM?

In order to affect the native data synced from Zoho CRM, custom functions should be set up at Zoho CRM’s end. The Custom functions will be executed only for the transactions created under the Zoho Finance module in Zoho CRM. Any custom function configured for the Customers, Vendors, or the Items module in Zoho Books will not be executed for customers, vendors, and items created in Zoho CRM and synced to Zoho Books.