Article lists are valid for a specific period of time. There is a report that you can schedule to run at periodic intervals, to monitor the available stock of article lists and delete those whose validity has expired.
To prevent anything being deleted that is still required, the system issues an information message to the owner of an article list due for deletion. A control parameter defines how many days before validity expires a message like this is sent. If any article lists among those flagged for deletion will still be required after their validity expires, the respective owner can adjust the validity period of their article lists.