Offline File Sync

I have a client that is using RDC to log into their server. Everyone works off of the server and they have their own desktop and folders. All of their data is stored on the server in different shared folders. They want to be able to sync files between the virtual desktop and local desktops for when they travel and do not have access to the internet. I was thinking of a folder on the virtual desktop that they could drag files to and have it sync to the local desktop. Not sure if there is a way to make it work this way. I have tried sync manager and just running into problems. Anyone have any ideas or suggestions on an easy way to do this?
Thanks in advance.
Marcus