In your “Admin” section, go to “Edit or delete a forum”. You can find this in the “Forum Management” table, which is the third one from the top. After you select the forum you would like to prune, you will see a box that says, “Expire threads after how many days (0 - Never Expire)” You can then enter an expiration time. For example, if you enter “7” (without the quotes), then the server will delete all threads that no one has posted to in the past 7 days.
In order for this to work, however, you have to either setup a cron task for your doexpire.php file, or run it daily in your browser. The file is located in your cron/php folder. Instructions in setting up cron tasks can be found in the “Docs” link in the navigation bar here to the left.
