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By default, the connector will only retrieve the data that has been created from the moment you linked your account from the external application. However, at any point, you can decide to sync your historical data (all the data created prior to this moment). An option is provided to the end-user to synchronised synchronise pre-existing data between applications.
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The connector framework provides mechanisms to easily map the fields between the 2 APIs so when implementing a new Connector, so the development team only focuses on mapping the data.
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