Because Alteryx Designer is using basic authentication (not our standards like Kereberos and NTLM), Alteryx Designer failed to pass our proxy authentication. Our network security support decide we will use user agent to identify the request is coming from Alteryx Designer and let the authentication thru. Then we realize Alteryx Designer also does not set the user agent for the HTTPS request. We are requesting Alteryx set the user agent value for the download tool https request,