Update the Subject and Body of an Email Message
Marketing Cloud has a new model for storing, finding, managing, creating, sharing, and distributing all content-related objects. Access the objects created with the new Content Builder tools using the REST API. Your existing SOAP API integrations only function with the Classic tools in Marketing Cloud.
This page contains information about updating the subject line and body of an email message via the SOAP API.
Using the information in this document, you can update your email messages to contain any changes or updates you may require. Using the SOAP API allows you to update this information programmatically and avoid manual contact with your code.
Use the sample code below as a model for your own call.