we are looking at an Exchange 2010 implementation (from MDaemon), and they would like to use Public Folders for external Contacts that are shared within departments only. I am looking at using Dynamic DLs for departments, and have read if you grant access to a Public Folder for the dynamic DL the DL will be converted to a Security Group. My question is, does that Group still function as a Dynamic DL once that happens? The documentation I have read isn't clear on it. If it doesn't, can anyone suggest a better way of doing this?