3472917 - Issues while creating email interactions over the REST API email-service

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental. 

• The Service Cloud V2 (SCV2) Admin using the "/sap/c4c/api/v1/email-service/emails" REST API service to post replication data to SCV2.
• The intent is to create email interactions of emails that were already handled in other external systems.
• Business would like for said email interactions to show up in the corresponding timelines (for example, Business Partner timelines, Agent Desktop Customer Hub timelines etc)
• Problem - Two potential issues can occur:
  1. If the administrator is using a Technical User to send the post message to the REST API, the system returns the error:
     {
       "error": {
         "code": "emailInteraction.10040",
         "message": "No employee associated with User",
         "details": null,
         "target": null
       }
     } 
  2. In the customer's timeline in the Service Cloud UI, the Sent On date and time of emails is shown as the time of the post message, not the actual time of the "sentOn" date and time included/defined in the JSON or XML content.

• SAP Service Cloud Version 2 1.0
• SAP Sales Cloud Version 2 1.0

/sap/c4c/api/v1/email-service/emails , KBA , CEC-CRM-EML , Emails for SAP Sales/Service Cloud , Problem