I just finished installating SSRS 2008 R2 on a brand new machine. I have the ReportServer databases on that same system (System A) but I'm connecting to System B for the reports data. I'm getting the following error when running the report, the data source that I'm using is set to use windows credential. Just to mention we have another server System C which is also configure as SSRS and connects to System B for the data and is working properly.
An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'dsULDBDev'. (rsErrorOpeningConnection)
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.