The CAS role is great and it provides a much better mobile experience, but it is not truly a "mobile user" role. Also, I do not believe that it changes the issue of sync'ing public folders.

Sync Outlook Public Folders with iPhone.
 

Jennifer,

Please accept my apology for not getting back to you sooner. I am not very adept at this, FT locked me out of replying to your last message. Try this URL to answer your question about copying your Outlook calendar from a Public to Personal folder:

http://support.microsoft.com/kb/197038/en-us

Bryan

P.S. I live in Naples, Florida

There is a workaround in this case. Codetwo did an app that allows syncing public folders with private mailboxes automatically. It needs to be installed on the server. Once you sync public data with a default mailbox item, it can be easily accessed from iPhone or any other device that connects to Exchange default folders only.

Maybe this will tell you more:

http://www.codetwo.com/exchange-folder-sync/

www.smartafone.com
 

There is a simple way to sync Public folders with your smartfone - www.smartafone.com. My company is using them over a year now and its flawless

smartafone.com
 

Alternative to syncing public folders with smart phones is www.smartafone.com. We use them over a year now and its flawless. And the price is right!