Using CiviCRM 4.6.9 on Drupal.
We've never enabled automatic updating of membership status, but now it's time.
How to do this? I remembered that there is a Scheduled Job for this, but in looking at the description it says that it's obsolete as of v 4.3.
It seems this functionality has migrated over to Scheduled Reminders, however we had not planned on doing membership reminders automatically. Our membership director is very comfortable sticking with her own mass emailing of membership reminders on her own schedule.