I have win 2003 and a domain setup in main office. I want to know if this is possible: if DFS is configured between two sites and replications of data are done on both sites, will DFS yell if one user is editing a file and another user from the 2nd site tries to use that same file? We have CAD files that needs to be access over DSL VPN but the problem is speed. It's very slow. After considering many options: upgrading to T1, termnial services, etc, our best solution right now is to put a dedicated server in that remote office (6-7 users) and host those CAD files and have it sync to our main office. That's where DFS comes in but I'm not sure about the file priviledges - i want only one user to be able to edit a file and have DFS yell at the second user who wants to use the same file. Any help would be appreciated.