Some of my employees in Zoho People did not sync with Zoho Payroll. What might be the reason behind this?

If you face any sync errors during the Employee Sync stage of the Zoho People - Zoho Payroll integration, go through the following steps.

Sync Employee Database

Note: Once employee sync is enabled, you will not be able to add employees in Zoho Payroll. You would have to use Zoho People as your primary application for adding employees.