Universal containers has included its orders as an external data object in to Salesforce. You want to create a relationship between Accounts and the Orders object (one-to-many relationship) leveraging a key field for account which is on both external object and Account. Which relationship do you create?

Indirect Lookup Relationship

Explanation:

We can use Indirect Lookup Relationship, where there are external data without ID, en Salesforce.

Make sure the field can distinguish between uppercase and lowercase When defining the custom field of the main object.

For example:

We have contact records with the main object, and we have a list related to social media in the external object with matching social bookmarks.