Returns employee dependents for the company. When employeeid is provided, only dependents for that employee are returned. When omitted, all dependents across all employees are returned. The response is a JSON object with a top-level key "Employee Dependents" containing an array of dependent objects. SSN and SIN are returned as masked values (e.g. "xxx-xx-1234"). State and country are returned as full names. Supports both JSON and XML response formats via the Accept header. Requires Benefits Administration permissions.