Note that this issue is blocked by MDL-61743 ; MDL-61743 is a requirement because otherwise the link to core_privacy does not work properly and you may get errors during the scheduled task execution. Prerequisites You will need the following: course1 , A course without end date course2 , An ongoing course (course start date < now < course end date) course3 , A finished course (course end date < now) user1 , A non-admin user that has logged in at some point in the past (just log in if you don't have any) and without enrolments user3 , A non-admin user that has logged in at some point in the past (just log in if you don't have any) with an enrolment to course1 user4 , A non-admin user that has logged in at some point in the past (just log in if you don't have any) with an enrolment to course2 user2 , A non-admin user that has logged in at some point in the past (just log in if you don't have any) with an enrolment to course3 Test Log in as admin Go to "Site admin > Privacy and policy > Data registry" Select 'Site' node from the contexts tree if it is not already selected Create a new category and a new purpose (the purpose with retention period of 0 years) Press 'Save changes' so the category and the purpose you just added are linked to the 'Site' node Open a CLI and execute this: php admin/tool/task/cli/schedule_task.php --execute=\\tool_dataprivacy\\task expired_retention_period You SHOULD see some "Deleting context XX - User: YY" messages; user1 and user2 SHOULD appear there You SHOULD see some "Deleting context XX - Course: YY" messages; course3 SHOULD appear there