I have an SSRS report that connects to an cube using a shared SSAS data source with integrated security. In visual studio the report works fine and connects successfully. Once I deploy it to the report server (sharepoint 2013 integrated/sql 2012) then it won't work and gives an access denied error.
My user is an admin on the SSAS instance so security is not the issue. Can connect fine with ssrs in visual studio, excel, ssms. Only once the report is deployed and run in sharepoint it doesn't work. Similar error if I go to the data source in sharepoint and try to test the connection.