Is there an answer for this? I have the same issue. I created a subdomain (reports.mydomain.com) and created a binding in iis. I can hit that website and it opens the login page for the report server.
When I go to my website (reports.myWebsite.com) Here is the login screen I can see:
Here is the prompt for server login credentials I see after logging in above:
Here are my bindings in iis:
If I choose to enter my server login credentials, it will log me into the report server and I am able to use the report server. Any ideas to prevent the server login.
My windows firewall is currently turned off in order to help troubleshoot this issue.
I just got off the phone with Syncfusion and here was the answer for me: