An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'ECM'. (rsErrorOpeningConnection)
For more information about this error navigate to the report server on the local server machine, or enable remote errors
Login to data source on report server to verify authentication which was successful
Worked with VMware support on solution
add basic to the end of the AuthenticationTypes string in the rsreportserver.config file of the report server.
C:\Program Files\Microsoft SQL Server\MSRS10_50.MSSQLSERVER\Reporting Services\ReportServer