List Membership changes on Update

When we PUT an update to a contact: If we provide a set of List Memeberships, does it REPLACE the current memberships with the new ones, or does it just ADD any new ones to the existing ones?

ย 

Thanks for any help.

2 replies

Join Our New Small Business Marketplace!

We're highlighting small businesses from our community. Add your business to the Marketplace to get discovered by new customers and support other entrepreneurs.