# Job Step: CustomerListsDeltaExport **Type ID:** `CustomerListsDeltaExport` **Scope:** Site (add to a site-level job flow) **Category:** Standard / system job step (Export) Creates Delta Export for Customer Lists. Support must be contacted to enable delta exports. This is a built-in (standard) job step provided by the B2C Commerce platform. Add it to a job flow in **Business Manager → Administration → Operations → Jobs**, or reference it by its type ID in a `jobs.xml` flow inside a site-import archive. ## Configuration Parameters | Parameter | Required | Default | Allowed Values | Description | | --- | --- | --- | --- | --- | | `Consumers` | Yes | — | — | Comma separated List of consumers, Character limit 1000 | | `CustomerLists` | Yes | — | — | Comma separated list of Customers, Character limit 1000 | | `ExportFile` | Yes | — | — | Delta Export name and Export file name and path relative to 'IMPEX/src'. | ## Working With IMPEX Files This step writes a file into the instance IMPEX area (typically under `IMPEX/src/...`). The produced file can be consumed by a later step in the same flow (for example a replication or a custom processing step) or downloaded via WebDAV. See the `b2c:b2c-custom-job-steps` skill for IMPEX hand-off patterns. ## Related - Run a job that uses this step: `b2c job run ` (see the `b2c-cli:b2c-job` skill). - Author custom steps to chain with this one: `b2c:b2c-custom-job-steps` skill. - Find more docs: `b2c docs search ` and `b2c docs read `.