# Marketo - Update custom object action
This action updates a custom object record in your Marketo instance. It will search for existing record by a given dedupe field. If an existing custom object is found, it will update the custom object. Otherwise, a new custom object will be created.
Update custom object action
# Input
| Input field | Description |
|---|---|
| Custom object name | The name of the custom object to be created. |
| Custom object input fields | Additional input fields will by dynamically generated for the custom object type. |
| Dedupe by | Select the method to deduplicate. To dedupe by the Marketo GUID, select IdField. |
| Custom object ID | The Marketo GUID of the custom object to update. Only required if dedupe by IdField. |
# Output
| Output field | Description |
|---|---|
| Marketo GUID | A unique ID for the updated Marketo custom object. |
Last updated: 7/2/2021, 7:06:19 AM