Oct 18, 2012
Setting up SQL 2008 R2 SRSS and SharePoint 2010
if you get a blank site or multiple password prompts, make sure that
C:\Program Files\Microsoft SQL Server\MSRS10_50.SRSS_TEST\Reporting Services\ReportServer\rsreportserver.config
does not contain RSWindowsNegotiate. It should look like
<AuthenticationTypes> <!-- <RSWindowsNegotiate/> --> <RSWindowsNTLM/> </AuthenticationTypes>
(via http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/d2f2676a-4720-4301-815f-29d81341a0c4/)