I think more generally, the ability to export all contacts' experience history out of Qualtrics to understand the survey invites they receive, complete, etc. would be helpful on its own or to import into Salesforce or other applications where the data is needed.
I don't have the exact answer you are looking for, but what we do is create a Survey Activity record (custom object in SFDC) whenever we are scheduling the survey either through automated workflow or manual data pull, and then include Survey Activity ID in the contact record upload and map back to it to update the response status, optouts, etc. The only thing we are missing is the bounces.
Survey Activities appear as a related list on the contact and account, and any other object the survey may have been related to in the instance of transactions that are tracked in SF (cases, etc.)
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