Archiving email CRMScript

Hello,

My goal is to archive an email i send using the Email class in CS as email in SuperOffice.

Currently i have the following code:

Void archiveEmailAsDocument(String emailSubject, String emailContent, Integer documentTemplateId, Integer companyId, Integer personId, Integer associateId)
{
  NSAssociateAgent associateAgent;
  NSAssociate associate = associateAgent.GetAssociate(associateId);
  
  NSListAgent listAgent;
  NSDocumentTemplate documentTemplate = listAgent.GetDocumentTemplate(documentTemplateId);

  NSContact contactEntity;
  contactEntity.SetContactId(companyId);

  NSPerson personEntity;
  personEntity.SetPersonId(personId);

  NSDocumentAgent documentAgent;
  NSDocumentEntity documentEntity = documentAgent.CreateDefaultDocumentEntity();
  
  String docName = getCurrentDateTime().toString() + emailSubject + ".msg";
  docName = docName.substitute(" ", "--");
  
  documentEntity.SetName(docName);
  documentEntity.SetHeader(emailSubject);
  documentEntity.SetContact(contactEntity);
  documentEntity.SetPerson(personEntity);
  documentEntity.SetDocumentTemplate(documentTemplate);
  documentEntity.SetDate(getCurrentDateTime());
  //documentEntity.SetCompleted(1);
  documentEntity.SetAssociate(associate);
  documentEntity = documentAgent.SaveDocumentEntity(documentEntity);

  NSStream stream;
  stream.SetStream(emailContent.toByteArray());

  documentAgent.SetDocumentStream(documentEntity, stream, true);

}

the code works fine, it save a appointment and document row, and a .msg file is created in the SO_ARC.

But outlook and the internal mailbox both show a error when trying to open the email in CRM.

Outlook:

Internal mailbox:

If i look in the .msg file the it does have the email content, looks like CRM doesn't see it as a valid email?

Is there a way to archive an CS email as valid email in CRM using CRMScript?

Thanks,

David