Hi, For those who are hosting an Exchange 2000 or 2003 server with multiple domain names, I have a question: Do user login names have to be unique across domains? If so, how would one handle several users (each with their own individual domain name) who want the same "login name" e.g. webmaster@xxxxxxx webmaster@xxxxxxx webmaster@xxxxxxx Note that these are truly independent users, unrelated to, and unaware of, one another, different companies/organizations, and *MUST* remin independent of each other. TIA! Mike.