You can choose a custom object as the target object in a

synchronization

task or

mapping

task.

If you choose a Marketo custom object as a target in a task to write data, you cannot write to the createdAt, updatedAt, and MarketoGUID fields of a custom object in Marketo. Marketo creates the following fields, by default, when you add a record to a custom object in Marketo:

createdAt. Date when the custom object record was created.
updatedAt. Date when the custom object record was updated.
MarketoGUID. The Marketo field ID for a record created in a custom object.

To write custom object records to Marketo, you can configure the following advanced target properties in a

synchronization

task or

mapping

task:

Custom Object - Dedupe Fields
. The dedupe fields or ID fields of the custom object in Marketo to which you want to perform an update or delete operation.
Success File Directory
. Specify the directory for the success file.
Error File Directory
. Specify the directory for the error file.

For example, you want to update records to the reservation custom object in Marketo. Enter

dedupeFields

in the

Custom Object Dedupe Field

.

The following table shows the details of the records that you want to create in Marketo:

arrivalDateTime	flightCode	pnr	fare	TicketNumber
7/21/2015 05:30:00	BA-754B1	BAF57HG1	55000	1001
12/29/2014 03:00:00	JA-555S2	BAF57HG1	79000	1002