You can map source columns to target columns on the Field Mapping page of the

Synchronization

Task wizard. You must map at least one source column to a target column. You can map columns with compatible data types or create field expressions to convert data types appropriately.

Based on the operation, the

synchronization

task requires certain fields in the field mapping. By default, the

synchronization

task maps the fields with similar names. When you configure the field mapping, ensure that the required fields remain mapped. If you do not map the required fields, the

synchronization

task fails.

The following table shows the required fields for each task operation and target type:

When you configure field mappings, you can also perform the following tasks:

Map a column with similar name.
Edit field data types.
Add a mapplet to the field mapping.
Create field expressions to transform data.
Create lookups.
Validate expressions defined in the field mapping section.

If you included multiple source objects in the task, you can select each source object in the Sources field to display the fields for the selected object. Or, you can view all source object fields. When displaying all source object fields, the Sources table displays field names grouped by source object. You can place the cursor over the Status icon for a source field to determine the Label and API names of Salesforce source fields. Label names appear in the Salesforce UI. API names are the names required by the Salesforce API.

To configure external IDs for related Salesforce objects, use

Related Objects

to select the external ID for each applicable related object. You do not need to specify the external ID for a related object if you do not want to update changes for that related object. If you do not specify the external ID, the

synchronization

task requires that the source provide the Salesforce ID to uniquely identify records in each related object.