We use exchange 2003 and mostly office xp outlook. (all the latest service packs and patches are installed on the client machines). Where do I go in exchange 2003 to modify settings so that users can send and receive url addresses and other attachments without the message "Outlook blocked access to the following potentially unsafe attachments. . ." Or how do I change this on the client. This is for my boss, and he is cross and in a hurry. Please help. Thanks.