title: sql server backup not truncating transaction log
body: <p>we have created a maintenance plan to backup our databases and transaction logs every night. I noticed that when the backups are completed, the transaction logs are not getting truncated. I checked the settings and I don't see any option. we are using sql server 2008.<img src="https://i.stack.imgur.com/xGQs2.png" alt="screen shot of the maintenance plan"></p>