Symptoms
SharePoint SmartObject Item Reference user field with multiple subset parts returning Stringg] instead of a name/email string.
Diagnoses
The grouped object was likely returning Stringn] of it's child strings.
Resolution
Looked at the SmartObject in Management and saw that the 'Value' column was present with data. Swapped out the current field with the 'Value' field and it rendered correctly in the email.
