---
title: "Set up the Header Mapper activity"
slug: "bc-set-up-the-header-mapper-activity"
tags: ["BC", "BIS", "Business Central", "Business Integration Solutions", "Task"]
updated: 2026-06-25T07:59:23Z
published: 2026-06-25T09:59:17Z
canonical: "docs.staedean.com/bc-set-up-the-header-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 Header Mapper activity

The Header Mapper activity maps a source document to the headers of an endpoint, such as **SMTP** or **Outlook**.

To set up the **Header Mapper** activity, first add an element that has headers defined to export data from Microsoft Dynamics 365 Business Central. Configure this activity in combination with the following elements:

- **SMTP Writer** / **Mail Writer**
- **Outlook Writer**
- **Webservice** endpoint

> [!NOTE]
> **Note**
> 
> More elements may be added or modified to support dynamic setup values in combination with the **Header Mapper**.

## Steps

1. Create a notification and insert the element **HEADERMAPPER**.
2. On the elements line, select **Edit**.
3. Select an endpoint for which you want to configure the headers.

> [!NOTE]
> **Note**
> 
> Depending on the selected endpoint, specify the fields in the **Header Configuration** FastTab.
4. Select the document you want to map to the endpoint headers. Use the assist edit to define the mapping correctly.
5. For each header field, specify an expression for mapping. Use the assist edit to define the mapping correctly.
6. Select **Check Configuration** to see if there are Anywhere Mobility Solutions configuration errors.
7. Select **OK**.

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

## Related

- [HEADERMAPPER activity](/bc-headermapper-activity.md)