Cumulus Financial needs to create a composite key on an incoming data source that combines...

 Composite Keys in Data Streams: When working with data streams in Salesforce Data Cloud, there may be situations where a primary key is not available. In such cases, creating a composite key from multiple fields ensures unique identification of records.

 Formula Functions: Salesforce provides several formula functions to manipulate and combine data fields. Among them, the CONCAT function is used to combine multiple strings into one.

 Creating Composite Keys: To create a composite key using CONCAT, a consultant can combine the values of Customer Region and Customer Identifier into a single unique identifier.

Example Formula: CONCAT(Customer_Region, Customer_Identifier)

 References:

Salesforce Documentation: Formula Functions

Salesforce Data Cloud Guide