I used to have an option against the folder properties called AutoArchive. I also had an option in the File menu called Archive. Since starting with a fresh install of SBS 2011 I no longer have this option.
The odd thing is: Some people on the same domain DO have this option. One person HAD this option then it disapeared. Some people DON'T have this option.
I can't see it being a group policy problem if some people have it and others don't but I am willing to look into anything as I need this option available for all my users.