You can mark a task as complete at any time by clicking on the "Mark as complete" button, or open it by clicking on "Mark as incomplete".
But only the network's administrator will have the right to open a task, once it's marked as completed.
If a task belongs to a maintenance plan, it is possible to mark it as completed only if all previous tasks have also been marked as completed. In the same way, it is only possible to reopen a task if all subsequent tasks are open (marked as incomplete).
The color of the task description changes according to its state in the various menus (news, Tasks reports, etc.). Tasks that appear in green are completed, and tasks in red are the ones that are late.
You can find all the information regarding the modification of a task's status displayed at the bottom of the history with the name of the user, the date, and the time of the modification.