What is the impact on Salesforce sync of static list uploads into Marketo?

[Anonymous]

My organization has a use case where we may need to upload static lists to Marketo to capture the desired recipients for an email send.  The static list may or may not contain emails that are already sync'd to Marketo from Salesforce.  I am wondering if the activity for the emails in the static list are captured in the Marketo Leads database and what the impact would be on our sync back to Salesforce.  I am specifically wondering if a duplicate record would be created in Salesforce. 

Thanks in advance!

[Anonymous]

Hi Megan

When you upload the list into Marketo it will dedupe on email address, so anyone who's already in Marketo won't be created as a duplicate, and anyone who is new will create a new lead in Marketo. And depending on how you have set up your sync back to Salesforce, any of the new leads may be created as new leads in Salesforce.

Hope that helps

Bronwen