Client has domain hosted by ISDN service provider BellAtlantic. They currently use Outlook Express to retrieve and send mail through the ISPs SMTP and POP servers. They now want to use Exchange Server and Outlook. Is there a step by step method of configuring Exchange Server 5.5 to retrieve and send mail through the ISPs servers? Each user has a unique ID and password for the POP server. I’ve been searching, but have come up empty handed.