Adding "Truly" new people to Marketo using Static List
I have a static list and would like to add them to Marketo but some may already exist in Marketo Database.
Is there a way to find which ones will be new and only those are added.
Plus in this step I would like to add "Person Source" and change a data value for each new person being added via this static list.
Existing people (email ids) should not be affected.
I will appreciate a response...
Nimisha