By default, whenever you send an email from Dynamics 365 CE, you would have observed that the Tracing Token appended at the end of the Email Subject like CRM:00010003.

But, if you want to update this tracing token, follow the below steps.

Step 1: Login to Power Apps Maker Portal with your credentials.

If you are using US Government (GCC, GCC High and DOD) Cloud, Click on the article link and find your related URL and login to Power Apps Maker Portal.

or

Create 30 Dynamics CE Trial version and Open Maker Portal.

Step 2: Click on the Environment.

Step 3: Choose the required Environment.

Step 4: Click on Settings.

Step 5: Click on Advanced Settings.

Step 6: Click on Settings.

Step 7: Click on Administration Under System.

Step 8: Click on System Settings.

Step 9: Click on Email Tab.

Default Tracking Token configurations, can be seen in Configure folder-level tracking and email correlation section.

Below is the illustration for the Email Tracing Token.

You can update the Use tracking token section fields according to the below table.

Part	Description
Prefix	Configurable from 1-20 characters. The default value is Dynamics 365 apps: The prefix can be unique for each organization or environment. For example, in a multi-tenant deployment of customer engagement apps, we recommend that each organization configure and use a unique prefix.
Deployment base tracking number	Configurable from 0-2,147,483,647. Default value is 0. Can be used as an identifier for a specific environment.
Number of digits for user numbers	Configurable from 1-10. The default range is three (3) digits. This value determines how many digits to use when customer engagement app generates the numeric identifier for the user who generated the email activity.
Number of digits for incremental message counter	Configurable from 1-9. Default range is three (3) digits. This value determines how many digits to use when customer engagement apps generates the numeric identifier for the email activity (not the individual messages that the activity contains). Note: If you use the default value to generate a token with a three-digit number, it will increment the number through 999, and then restart the number at 000. You can use a larger order of digits to reduce the possibility of assigning duplicate tokens to active email threads.

In this article, will update only the Prefix value, and would like to leave the remaining default values.

Step 10: Update the Prefix from CRM to XRM and see the Preview.

Step 11: Click on OK to save your Settings.

Now create an Email Activity and Send to see your changes in the Email Subject.

Hope you have successfully changed this Tracing Token Prefix in the Email Subject.

Please share your valuable feedback on this article.