If you enable Originality Checking (Turnitin) after students have submitted files to the Submission folder, you will need to manually submit files for checking. This is the case even if you choose “Automatic originality checking on all submissions” during setup. These are instructions for manually submitting files for checking:
It will take some time to process, and when the originality checking process is complete, the “Submit file for originality checking” icon will be replaced with a “View originality report for_____” icon: