I configured a triggered send in Marketing Cloud choosing a Salesforce Data Extension as container of data sent through the API Call. This transactional email will be triggered from eCommerce after every contact's purchase.
At the same time I implemented MC Connector between Service Cloud and Marketing Cloud. The aim is to shown the email tracking results in the Individual Email Results tab in Service Cloud.
Using the SOAP API I sent the Contact ID (Salesforce ID) as SubscriberKey. The call doesn't fail and the email is sent, however I don't have any tracking results in Service Cloud. What could have gone wrong?