How to block SFDC sync for leads without values required in SFDC?

[Anonymous]

I'm starting a campaign that collects email only, no name, title, company etc. How do I block the sync of these leads to Marketo? These are required fields in SFDC, and I don't want these in Salesfoce until we eventually get all their info.

[Anonymous]

Christine,

Sync will naturally fail as these are required fields in SFDC as you mentioned. However, unless you're using Marketo Program > SFDC Campaign sync, you'd need a program with either the "Sync lead to SFDC" or "Add to SFDC Campaign" flow step to sync leads - they are not synced automatically. To block sync, you could simply create a smart list that holds anyone missing the key information, and add a choice on the sync flow step to block folks on the smart list.