You can configure your account via Exchange Active Sync from your mobile devices.
Server: msync.zoho.com
Username: Your Zoho Email Address (user@yourdomain.com for hosted accounts/ user@zoho.com for non hosted accounts)
Password: Your Zoho Password (If Two Factor Authentication is enabled, use Application Specific Password)
Domain : Leave Blank / Provide your domain name
Refer here for detailed instructions to configure your device.