Checkbox fields in Zendesk Sell cannot be set as required due to system limitations. You'll need to use a different field type for mandatory fields.
The system does not support making checkbox fields mandatory for leads, contacts, or deals. This limitation means that if you need a field to be required, you must choose another field type that allows for mandatory settings.
No, you cannot make a custom checkbox field required in Zendesk Sell. If you need a field to be mandatory, you'll have to select a different field type. While checkboxes are a popular choice for simple yes/no options, they cannot be set as required…
If you need a required field in Zendesk Sell, consider using a different field type than a checkbox. Checkboxes cannot be set as required. To ensure that a field is mandatory, you should opt for a field type that supports this feature….