Hello :-) Endeed, you must configure each users (mail or mailboxes enbled users) with such configuration. You can do it programmatically or with admodify tool that permit U to change the same setting for multiple users. Here is the tool: http://www.gotdotnet.com/workspaces/workspace.aspx?id=f5cbbfa9-e46b-4a7a-8ed8-3e44523f32e2 download the "ADModify.NET LATEST BUILD (04/04/2005 ? 879k ? 3322 Downloads)" Hope it helps :) Yann