How To Sync Exchange Public Contacts with your Mobile Device
There is no good direct way to sync Exchange Public Folders with your mobile phone. However, you can easily sync your personal Contacts folder with your phone using Microsoft Activesync or whatever your phone uses.
So all you need to do is set up a sub-folder in your Contacts and sync your Public Contacts to it. Then your phone can pick up the contacts from that folder, assuming it is a Blackberry or iPhone. A Windows Mobile phone using Activesync is not able to see subfolders of your Contacts. You’ll have to store everything in your main Contacts folder for your phone to see it.
This free Outlook add-in from Code Two will make it all happen.