Hi I am setting up Mac OS X clients with entourage. Microsoft's implementation for Macs uses IMAP. For users to access there E-mail it seems the user account has to be given in the form DOMAIN\ACCOUNT\ALIAS However when the user sends a message I get an error that the SMTP server fails to authenticate. If they re-enter there user account in the form simply ACCOUNT then the message goes through. Is there any way to get the SMTP server and IMAP server to uses the same way of entering the account and password Thanks in advance Lloyd