If I am required to connect a data extension to the data model (for an outside product), does the contact count immediately go up before I am able to manipulate the data? The outside product has a different primary key than what we would use in SFMC and I do not want to duplicate contacts.
Example: Sendable DE connected with wrongid as primary key, connected to data model with 1:1 on wrongid=SFMC Contact Key
What I want to happen: Bring data in from other product, query to another DE with the rightid as primary key. Then the Sendable DE is connected to data model with 1:1 on rightid=SFMC Contact Key