I have a new Exchange 2010 server and an Exchange 2003 server.
I have done the following, but still my public folders which were originally created on the 2003 server are not viewable on my 2010 server:
Gone to System Manager on 2003.
Navigated to the system folders in the FOLDERS folder in the Frist Administrative Group
Went to the first offline address book folder
Right clicked and said ALL TASKS, Manage Settings
In the Manage Public Folder Settings wizard, I chose to Modify the list of replica servers
Added the Exchange 2010 Mailbox Server to the new replica.
I waited 24 hours, but the public folders never replicated.