Salesforce is a robust CRM tool that allows organizations to manage their customer data efficiently. The modifications and customization of org. users’ data is also done as per the required scenarios.
Salesforce provides a powerful tool known as Data Loader, which allows administrators to seamlessly update and maintain user information in bulk. In this Salesforce tutorial, we will learn to mass update email addresses and usernames with Data Loader in Salesforce.
Data loader to Mass Update Usernames and Email addresses
We can update the usernames and email addresses from the user profile setup, but when it is required to mass update the username and email address, then that process will be time-consuming and prone to errors.
In that scenario, it is better to use the Salesforce Data loader tool to Mass Update Usernames and Email addresses, which is designed to handle the bulk import, export, and update of data within the Salesforce instance.
The data loader is particularly valuable for administrators to manage large datasets and complex data relationships.
Mass update Email addresses and Usernames with Data Loader in Salesforce
To mass update Email addresses and Usernames with Data Loader, make sure that Data Loader is installed in your system and you have access to the system admin to update users’ data.
Now follow the below steps if you meet the above requirements.
1. To update the email addresses and usernames of users, we need the users’ ID and their current email and usernames. It will be better to run an export to get the values of these fields by following the steps.
- Log in to the Data Loader.
- Click Export
- Select the Users object.
- Select the fields Username and Email, and make sure to include the User ID.
- Click Finish
2. Now open the exported file and update the email and usernames of the users, then save this CSV file in your system from where it can be accessed to the data loader.

Now, the CSV file is ready, and in the further steps, we will perform the data update operation.
3. Open the data loader and click on the Update button.

4. In this step, select the data object User, then browse the CSV that we have created in the above steps, and then click on the Next button.

5. Now, the data loader will initialize the uploaded CSV file and the number of rows in the file. Here, click on the OK button to proceed.

6. In this step, we will map the CSV column headers with the object field names, and for that, click on the button Create or Edit a Map.
In the next window, click on Auto-Match Fields to Columns. Now the object fields will be auto-matched with the CSV columns, if not then you have to drag the object fields down to the column mapping.

7. In this step, select the location for the success and error files from where they can be accessed later. After this, click on the Finish button.

8. As we click on the Finish button, a warning message will appear on the screen. Here, click on the Yes button to proceed.

9. Now, the data update operation will start, and it will display the number of successes and errors in a dialogue box.
In this scenario, we got a success message with zero errors, which means that we have successfully updated the records data.
Here, click on the button View Successes to see the status of updated records.

Now, in the Data Loader CSV viewer, we can see the status of updated usernames and emails. You can also view the updated data in the profile setup in the Salesforce console.

In this way, we can Mass update Email addresses and Usernames with Salesforce Data Loader.
Conclusion
In Salesforce, the data loader is a useful tool for system administrators to make the data management process more efficient. By following the steps in the above example, you might have gotten good insights about the method to mass update email addresses and usernames with the Salesforce Data loader.
Now, you will be able to execute mass updates for email addresses and usernames, ensuring that CRM data remains accurate in your organization.
You may like to read:
- How to Mass Update User licenses with Data Loader in Salesforce
- How to Make Email Field Unique in Salesforce
- How to Create a Custom Address Field in Salesforce
- How to Mass Update Addresses in Salesforce
- Insert Multiple Users With Data Loader in Salesforce
- How to Import Opportunities into Salesforce via Data Loader
I am Bijay Kumar, the founder of SalesforceFAQs.com. Having over 10 years of experience working in salesforce technologies for clients across the world (Canada, Australia, United States, United Kingdom, New Zealand, etc.). I am a certified salesforce administrator and expert with experience in developing salesforce applications and projects. My goal is to make it easy for people to learn and use salesforce technologies by providing simple and easy-to-understand solutions. Check out the complete profile on About us.