# Workday – Update business object action
The Update business object action updates a Workday custom object associated with a business process. This action supports custom objects like Worker additional data, Service dates, and other effective-dated data tied to workers or other entities.
The action dynamically adjusts input and output fields based on the selected Business object.
# Input
| Input field | Description |
|---|---|
| Business object | Select the Workday custom object to update, such as Worker additional data, Service dates, or Work eligibility. |
| Business process parameters | Configure optional workflow settings. If omitted or set to false, Workday runs the business process with standard approvals, reviews, and validations as if submitted through the UI. |
| Edit object record data | Provide effective-dated data to update for the selected object. Include all instances if the object supports multiples. Workday deletes any omitted instances. |
| Fields with attributes | Select additional fields with custom attributes to update. The list varies depending on the selected business object. |
| Fields with multiple values | Select fields that accept multiple values (arrays or lists). These are also specific to the selected business object. |
Additional input fields may appear based on the Business object selected.
# Output
Output fields depend on the selected Business object. For example, updating the Worker additional data object returns the following output:
| Output field | Description |
|---|---|
| Event reference (IID) | Internal ID of the Workday event. |
| Event reference (WID) | Workday ID of the event. |
| Event reference | Object representing the associated business process event. |
| Worker reference (WID) | Workday ID of the worker. |
| Worker reference (Contingent_Worker_ID) | Contingent worker ID, if applicable. |
| Worker reference (Employee_ID) | Employee ID of the worker. |
| Worker reference | Object representing the worker. |
| Effective date | Date the update takes effect. |
| Additional data | List of custom fields updated in this request. |
Last updated: 1/13/2026, 2:50:00 PM