How can I sync all folders from an Exchange server (not just the Inbox)? I am using a Samsung Galaxy S2 (Android 2.3.4) and have set up the native email app to synchronize with an MS Exchange 2007 server. The problem I am noticing is that I'm only notified for a new email if it is sent to my Inbox folder. I have to sync my other folders one-by-one.

Is there any sync all option?
Unfortunately the native Android Exchange Client doesn't support automatic sync of sub-folders, as you have seen you can go in to the folder and sync it manually but that isn't much use.
This hasn't been improved much in Android 4.0 Ice Cream Sandwich. The sub folders now sync but it doesn't notify you of new messages in them which isn't really any better.

I would recommend using a 3rd Party client like Moxier or Touchdown. Both have trials so that you can test them first.