We recently upgraded from ZCS 5.0.18 to 6.0.7. One of our accounts people noticed that in the admin interface, when editing a user's account, in 5.0.18 there was a "Department" field under the Contact Information tab. This field is gone now. We can still retrieve it via zmprov ga (acctname) of course, but this is less convenient. We're a college, and this field is used by our accounts people as an easy way to store, in zimbra, the year that a student is graduating.