Not supported. This is the function that the command line utility "NET SEND" uses, and therefore, has the same restrictions. You'll either have to change your domain configuration so the target domain trusts the senders domain (not likely to happen), convert your domain environment to Active Directory (also not likely to happen), or use a different messenging system that isn't dependent on Windows Security to work. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
