We have external tools that manage certain forms e.g. product registration - where a user can register multiple products. We dont want to use marketo custom objects (dont agree with the idea of a cost for a 1-to-many data structure - no need to justify it here); however, we do want to use marketo for sending/managing the communications.
How to set the external tool to communicate to marketo which users to be in the smart or static list. (note: those users already exist in marketo)
e.g. external database pulls email address for all users that registered a WidgetA. That external tool needs to then push that email list to marketo for use in a program. There should be a sort of: paste all emails function for this. Please advise.
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