Hello
Yes, this change is related to SSL -- also, this solution worked for me too. I do not know why this flag was incorrectly set by Report Server. My problem was using SSAS 2008 on Vista.
I will provide a link on how to change rsReportServer.config:
http://msdn.microsoft.com/en-us/library/bb630448.aspx
Also, my specific copy of this config file was in the following directory (different from the MSDN documentation):
\Program Files\Microsoft SQL Server\MSRS10.MSSQLSERVER\Reporting Services\ReportServer
To contrast, the MSDN documentation said:
"RSReportServer.config is located in the \Program Files\Microsoft SQL Server\MSSQL.n\Reporting Services\ReportServer folder."
Finally, I made copy first of rsReportServer.config, and then I changed the original file. It is always important to make copies of configuration files before changing them (in case you need to go back). Once I saved and closed the file, I was able to successfully deploy. I did not stop any services to do this editing (though you may have to if you have other users actively using Reporting Services on that server).
