Our spatial technology team create an interactive map works perfectly on siteA. We need integrate this map to a web application which is hosted an siteB. Then we got "GET http://siteA/webgis/rest/info?f=json 401 (Unauthorized)" error. I noticed this error was happened after we implemented geometry union method to query the features inside property boundary. The original discussion is here:https://community.esri.com/message/579411?et=watches.email.thread#579411
I read all the posts about CORS. I set up proxy server on siteB and add code to push through proxy server. None of the suggestions solved our problem. I truly need help. Thanks!