General Info: Only the Standard plan allows Custom Fields. You can only disable custom fields, and not system fields.
Prerequisites
Roles required to perform this action:
Organization Owner
Organization Admin
Disable field
Sign in to Zoho Directory , then click Admin Panel in the left menu.
Go to Users, then click Manage Fields.
Hover over the required field, then click .
Click Disable, then click OK. The field will be marked as Inactive. Existing user data stored in the disabled field will be hid in the User Info page until the field is re-enabled.
Note: The data will only be hid, not deleted. To delete the data completely, see Delete a field.