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Subscribe to Objects with Salesforce to Salesforce
When you are connected to a business partner using Salesforce to Salesforce, you can subscribe to objects that your business partner has published. When you subscribe to an object, you map it to an object in your organization. Standard objects must map to standard objects in your organization, but you can map custom objects to any custom object. For example, if your business partner has published a custom object named Prospects, you can map that to a custom object named Client.

