This article walks you through creating a Zoho Desk OAuth application and entering its credentials in the Horizon onboarding wizard.
Desk.tickets.READ,Desk.tickets.WRITE,Desk.search.READ,Desk.contacts.READ,Desk.accounts.READ,Desk.agents.READ,Desk.settings.READ,Desk.basic.READ
After a successful connection test, Horizon begins discovering your Zoho Desk fields and syncing your ticket data.