Looks like this is in fact an issue with shadow, which has its audit support disabled.
** Package changed: audit (Ubuntu) => shadow (Ubuntu) ** Changed in: shadow (Ubuntu) Status: New => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1414817 Title: [Ubuntu 15.04] Ubuntu should audit account modification events To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1414817/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs