The message center document says it's possible. But, enough information is not available.
https://docs.campaign.adobe.com/doc/AC6.1/en/MCE_Introduction_Interaction.html
Document says:
The @externalId attribute must contain the value of this identifier. Interaction is configured by default to identify the recipient of the primary key:
<rtEvent type="order_confirmation" email="john.doe@adobe.com" externalId="1242"></rtEvent>
What is this primary key?
We are trying to implement it on one of our client's campaign environment?
- How can I select an offer based on email?
- Does the email template need to include some javascript?
Any help is appreciated.