The message “Access denied while creating Web Service” was originally intended for the Status Code 103, but only few implementations used it. For now, it currently descript as used in the resumable requests proposal to resume aborted PUT or POST requests to the Web Server

Status Code 103 is exactly the same as the Status Code 308 except that it is sent as a provisional response than a final response. In other words, zero or more 103 response can be sent in a response when it is still being processed, after which a final response code must be sent.