Regardless of AX permissions, reports only appear for local system (Windows) administrators.
Users can browse to the report server manually and execute reports without an issue. Therefore, the users have the correct SSRS/SSAS permissions.
When running reports from AX client, they never attempt to appear and the SSRS log file never shows an attempt to execute them. If you make that user an admin on all ERP servers, it will appear (and the execution attempt was logged, of course).
What am I overlooking in AX that would have the program even attempt to run the report for local admins only?