You must be a domain admin to update a user's email.
- Find the ID (also known as profile ID) of the user whose email you want to update.
See Find the User ID.
- Use the API for updating a user's information.
- In the resource, specify the user ID.
In the request body, specify the firstName and lastName mandatory parameters, and the email parameter with the new email address for the user.
After the API call is executed, the email address is updated.