If Exchange Folder sync is not syncing please check the following location:
The steps from here vary depending on your make \ model \ Android version.
- From within Exchange Folder Sync slide out the Navigation Drawer
- Tap Settings at the bottom
- Tap Advanced
- Tap Open Account
You should end up with a screen similar to below and you need to make sure any sync you use is slid to the on position.
- Tap Exchange Folder Sync
- Tap your email address