Have a workaround using the Blob REST API to set properties but it would have been more "smooth" doing everything through the Blob DataSet + Linked Service.
Set blob properties when using Blob linked Service in Data Factory
Matthew Campbell
1
Reputation point
CONTENT-TYPE when sinking blobs through the Blob Linked Service is always application/octet-stream. Can blob properties be set during a Copy Data task? If the underlying Linked Service uses the REST API endpoint then headers should be exposed. Only way to circumvent is to generate a Bearer token (see sample) then issue a REST call after each Copy.