AWS Database Migration Service (DMS) provides heterogeneous migrations between different database platforms. The source database remains fully operational during the migration, minimizing downtime to applications that rely on the database. Currently, DMS can use AWS DocumentDB as a database source or target; however, DMS only supports MongoDB as a source endpoint for data replication.
Following are the steps to replicate data from DocumentDB to Atlas using the DMS. Please be aware that the twisted configuration may not be supported by AWS.