This presentation will show how CARNET arranged VLE and infrastructure for conducting online essay in Moodle simultaneously for more than 13.000 secondary school students during the COVID-19 pandemic. CARNET provided technical support for the online essay, which was a part of a trial graduation exit exam. The goal was to test system capability and adequacy of particular Moodle tools for the exam such as quiz and assignment. It will be presented how the system was set up and how activities were adjusted for various user groups, including those with learning disabilities. The results show that the majority of participants successfully submitted the essay via Moodle platform, which proved that Moodle is adequate as a platform for the online graduation exit exam for secondary school students simultaneously writing the exam.