Turnitin will be taking their services down for maintenance between 4 pm and 12 midnight on Tuesday July 10. To ensure that services remain stable, particularly during high submission periods, this maintenance will include several hardware updates and performance improvements. Users will be unable to submit and grade during this maintenance window, so please ensure that any submission deadlines are adjusted to fall outside of the window.
You can stay up to date with Turnitin system status by following @TurnitinStatus on Twitter.