We are integrating SkillJar traingin platform to Marketo. SkillJar does have not function to only allow to update records. https://launchpoint.marketo.com/assets/1797-skilljar/10604-skilljar/Skilljar-Marketo-Integration-Guide.pdf
However, since data delivered through direct integration is incomplete, we only want to allow data to come if the record (email) already exists in our systems. Otherwise we will create bunch of records with missing data.
Is there a way to do it from Marketo? We need to allow to update, but not create new records in our systems?
Does anyone know if that's Marketo functionality?