I'm trying to setup a sync between Microsoft Dynamics 365 Marketing lists and the Zoho Marketing Lists. The problem is that Zoho only allows me to pull from either Contacts, Accounts, Leads or Opportunities. There's an option for "Custom Module" but I haven't been able to try it because every time I do, I receive an error message. (Attached images.)

My question is this: I already have Marketing Lists setup in CRM. They are not segmented lists, we just have a separate list for each "target audience" and my sales team adds contacts to the lists accordingly. Sometimes they add them to multiple lists, depending on the purpose of the list. How can I sync from these lists to a corresponding list in Zoho?

We were syncing before to Mailchimp using a third-party tool like Zapier. We bought in to Zoho on some other platforms and thought we'd give Campaigns a try since it promoted "integrates with Dynamics", but I haven't figured out how to get it to integrate in a way that works for our business. It's important for me to NOT mess up my CRM flow. How can I achieve the result I want?