If i create an adhoc view and save it in the shared folder, how can I grant access to that shared folder to all users?
To grant access to the "shared" folder in Jasper, you can go to the repository, and right click on the "shared" folder, and select permissions. Look at what permissions are set for the ROLE_USER role (by default Role_User has access to the Users folder only), and update it to have Read or Read/Write permissions as needed. All users in Jasper will have that role, and thus will have access to that folder. Once the permissions are set, run the "Create and Update Jaspersoft Users" job in PPM - this will sync the permissions for Advanced Reporting.