---
title: "Add Message ID and User ID to Links"
slug: "add-message-id-and-user-id-to-links"
updated: 2024-03-11T07:46:23Z
published: 2024-03-11T07:46:23Z
canonical: "docs.mapp.com/add-message-id-and-user-id-to-links"
---

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

# Add Message ID and User ID to Links

## Goal​

If you are using [Cookieless Conversion Tracking](/v1/docs/cookieless-conversion-tracking) you have to add the Message ID and User ID or User Email to a message link. The online shop system has to save this information and add it to the conversion tracking pixel.

## Procedure

**Edit Group**

1. In the ​main navigation​ menu, click *Audience ​> Groups*​.
2. Next to the group desired for the sendout, click ![](https://cdn.document360.io/554b9b98-6720-4d8b-9919-c7b203d72648/Images/Documentation/cdede70b-319b-40e8-9670-7f6da4457207.png).
3. Click the ​**Tracking & Links**​ tab and expand the **​Link Parameters​** area. ![](https://cdn.document360.io/554b9b98-6720-4d8b-9919-c7b203d72648/Images/Documentation/982675cf-af01-47dd-99ea-f86c22256005.png)

**Creation User ID Parameter**

1. Click ![](https://cdn.document360.io/554b9b98-6720-4d8b-9919-c7b203d72648/Images/Documentation/1a29dade-040c-47b3-b31a-85494b1eb717.png)to open input fields for Link Parameter 1.
2. In the first input field, enter ​the **UID**​.
3. Position the mouse in the second input field and click the **Personalization**​ button.
4. In the **​Personalisation Parameters​** window, go to Identifiers and select ​**User ID** ​from the drop-down list. ![](https://cdn.document360.io/554b9b98-6720-4d8b-9919-c7b203d72648/Images/Documentation/c5341c4f-0fde-42fe-8dce-4e207233ae31.png)
5. Close the window. The placeholder **<% user.PK%>** is inserted into the second input field. ![](https://cdn.document360.io/554b9b98-6720-4d8b-9919-c7b203d72648/Images/Documentation/fc553559-b132-4520-bbc5-529d3786c909.png)

**Creation Message ID Parameter**

1. Click ![](https://cdn.document360.io/554b9b98-6720-4d8b-9919-c7b203d72648/Images/Documentation/1a29dade-040c-47b3-b31a-85494b1eb717.png) to open input fields for Link Parameter 2.
2. In the first input field, enter ​**MID**​.
3. Position the mouse in the second input field and click the **Personalization**​ button.
4. In the **​Personalisation Parameters​** window, go to Identifiers and select ​**Message ID** ​from the drop-down list.
5. Close the window. The placeholder ​**<%message.PK%>** is inserted in the second input field. ![](https://cdn.document360.io/554b9b98-6720-4d8b-9919-c7b203d72648/Images/Documentation/c2119278-1619-4258-b172-d964819f5806.png)

**Saving**

1. Click the ​**Save**​ button to save your settings. The message ID and user ID will be added to every link of **every message sent to this group**. This is not detectable by the recipient.
2. Click the ​**Save**​ button to save your settings. The message ID and user ID will be added to every link of **every message sent using this delivery settings profile**. This is not detectable by the recipient.

## Related Topics

To exclude some links, please see [​Exclude Links From Link Parameters​](/v1/docs/exclude-links-from-link-parameters).

To activate conversion tracking, you also need to create a tracking pixel and activate conversion tracking for each specific message (see [​Create a Tracking Pixel​](/v1/docs/create-a-tracking-pixel) and [​Activate Conversion Tracking for Messages​](/v1/docs/activate-conversion-tracking-for-messages)).