Connecting through POP3 or IMAP4 can benefit remote users
Outlook Express's support of POP3 and IMAP4 gives the email client some advantages over other Exchange 2000 Server email clients. For example, because Outlook Express isn't part of Microsoft Office, you don't need to buy a license to operate Outlook Express. In contrast, running Outlook requires that you have a licensed Office installation. (However, if you use Outlook Express with Exchange 2000, you'll need an Exchange server Client Access License—CAL.)
In addition, remote users can use Outlook Express while their machines are disconnected from the Exchange server. This ability is an advantage over the use of Outlook Web Access (OWA), which requires a continuous server connection. POP3 and IMAP4 usually create less network traffic than either Outlook or OWA, and unlike Outlook, Outlook Express can take advantage of Exchange 2000's new front-end and back-end deployment feature to simplify the server namespace and enhance security. . . .
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