How can I get a Custom Object's linked Lead's ID?

[Anonymous]

Hi,

I am making updates to Marketo Custom Objects via the rest API, and would also like make an update to the Lead that is linked to the custom object.

I know I can get the lead by filtering on the email address, but in the case that there are duplicate leads (same email address) I would need a way to differentiate which lead is linked to the custom object.

I was hoping there would be a simple way to get the Lead ID of the linked Custom Object, but I have not been able to find any based on the documentation and tests using the samples provided.

Is there a simple way of getting the Lead ID of lead linked on to the custom object?

[Anonymous · Accepted solution]

Not positive but what would happen if you made a custom field that essentially mirrored the Lead ID.  Would that new field be visible in this new custom object?

[Anonymous]

Ok mirroring the lead field on the custom object should work for us since we are creating them in a webservice that gets requests from a marketo webhook, so I can pass the Lead ID there when the custom object is first being created.

Thanks for the suggestion.

[Anonymous]

If i were to add a link field on the Lead ID, would I have to populate that when creating the custom object?