---
title: "Set up the Mapper activity"
slug: "bc-set-up-the-mapper-activity"
tags: ["BC", "BIS", "Business Central", "Business Integration Solutions", "Task"]
updated: 2026-06-25T07:59:21Z
published: 2026-06-25T09:59:17Z
canonical: "docs.staedean.com/bc-set-up-the-mapper-activity"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.staedean.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Set up the Mapper activity

The Mapper activity synchronizes the internal and external documents, especially when the external document structure differs from your internal document structure.

## Settings

| Field | Description |
| --- | --- |
| Source Document Type | Select the source document type. Typically, select **External** for an import connection and **Internal** for an export connection. |
| Source Document No. | Based on the source type, select the source document. |
| Target Document Type | Select the target document type. Typically, select **Internal** for an import connection and **External** for an export connection. |
| Target Document No. | Based on the target type, select the target document. |
| Processing Mode | Choose **Default** if the import data set is not too large. This option provides backward compatibility with previous Business Integration Solutions versions. Choose **Streaming** for better performance on larger data sets. Note that the streaming option cannot port to the SaaS version of Business Integration Solutions. |

![Mapper Settings](https://cdn.document360.io/da662430-6a41-47b1-8c7e-7e4ac37a9756/Images/Documentation/MapperSettings.png)

## Steps

1. Create a connection and insert the element **MAPPER**.
2. On the elements line, select **Edit**.
3. Fill in the settings fields, see [Settings](/business-central/docs/bc-set-up-the-mapper-activity#settings).
4. Select **Mapping**.
5. On the **Mapping Activity Lines** page, configure how the source fields and target fields map. Use the AssistEdit to define the mapping correctly.
6. Select **OK**.
7. Select **Check Configuration** to see if there are Anywhere Mobility Solutions configuration errors.
8. Select **OK**.

![Mapper Setup](https://cdn.document360.io/da662430-6a41-47b1-8c7e-7e4ac37a9756/Images/Documentation/MappingWithExpression.png)

## Related

- [MAPPER activity](/bc-mapper-activity.md)
- [Mapper](/bc-mapper.md)