Zoho CRM Call Preferences
Preference to show From Number / To Number fields in CRM User can enable the respective preference in order to have the field in CRM. i.e. If user needs From Number field, show_fromnumber preference is send as true in API If the account has any active telephony integration, the user is not allowed to disable any of the preference. If the account has active calendar booking for calls, user is not allowed to disable show_to_number preference.
Documentation
Documentation
https://www.zoho.com/crm/developer/docs/api/v8/
APIReference
https://www.zoho.com/crm/developer/docs/api/v8/list-available-rest-apis.html