Azure Data Lake Storage Gen2 only allows alphanumeric characters and the dash (-) in property name :
- Verify that all metadata property names comply with Azure's naming rules. They should contain only alphanumeric characters and dashes (-).
- You can use the "Fault Tolerance" feature in the Copy Activity. This feature allows the copy operation to proceed even if some rows are incompatible, skipping over the invalid metadata.
- Enable session logging within the copy activity to log any skipped data for further review.
- If the issue continues, consider using a Data Flow activity to separate compatible and incompatible rows before executing the copy operation.
If the problem persists, please let us know.