Add Objects and Fields to Replication | Salesforce
Add Objects and Fields to Replication
It is not possible to add objects or fields to replication in the data manager. To add an object, add an sfdcDigest node for it to one of your dataflows. To add a field for an object, add it to an existing sfdcDigest node for the object in one of your dataflows. The new object or field is added automatically to replication when you upload the updated dataflow definition file.