When I am openings ssrs Reports in my 2012 Instances. It showing error (The default Report Server Configuration ID could not be found in the ssrsServers table). I found that installation error. One of technical guy suggested me check .
Tools->Business Intelligence(BI) tool->Report Server->validate settings when I open it showing
step1: Go to AX 2012 application → System Administration module-> setup-> Business Intelligence-> Reporting services-> Report servers.
Step2: Create the Configuration Id , And will give the server name and URLs same as in server .
Step 3: Click on Report manager URL → In that floder ri8 click → security → new role assignement → in that will give permissions for your system user account
step1: Go to AX 2012 application → System Administration module-> setup-> Business Intelligence-> Reporting services-> Report servers.
Step2: Create the Configuration Id , And will give the server name and URLs same as in server .
Step 3: Click on Report manager URL → In that floder ri8 click → security → new role assignement → in that will give permissions for your system user account . And also give permissions to floder settings and site settings.