For the next 7 days I'll be posting one new / recently updated KB article that RIM has posted in the BTSC.

The first one is about enabling contacts within a public folder for access from BlackBerry handhelds. One thing to keep in mind is that you need BlackBerry handheld operating system 5.0 in addition to BES 5.0 or above for this functionality.

... and the article:

KB19111 - How to enable public contact folders for synchronization in the BlackBerry Administration Service...