I am having a terrrible time getting this to work. I have configured the SharePoint site and the SQL Servers involved to use Kerberos. That has been confirmed working.
I then configured the SharePoint site's Reporting Services integration (trusted account), enabled anonymous access and enabled report builder. I can launch report builder without any issues at all. The problem comes when I try to save my report. When Report Builder is started Items->New-ReportBuilder Report it opens and display in the lower left hand corner "No current report server." When I close the Wizard dialog and click connect I enter http://server.fqdn.net and I receive the following error:
Unable to connect to the server that is specified in the URL, 'http://servername.fqdn.net/'.
Make sure that the server is running, the URL is correct, and you have permission to use the server.
I have also tried http://servername.fqdn.net/reportsserver/. When I try that I receive a login prompt. When I enter my credentials it tries for a few seconds and then sends another login prompt. I installed the report server using default settings. The reporting services db is on the same server as sharepoint. The configuration and other databases are on a remote SQL Server. I am able to browse the http://servername.fqdn.net/reportsserver/ URL and see the directory structure in IE.