Assuming your mail server is accessible from the internet or that you are using a VPN/Dial-in you should be able to use the Outlook application or any other MAPI compliant mail software. I can't name any, but I am sure I saw some when I was browsing one day. Try searching on Google. If you have specific requirements let me know and I will try to help you more.
If you turn on the Pop and SMTP on your exchange server you can use any e-mail program you want like Outlook express, netscape has built-in e-mails, lotus notes....... If it is a select few people you can terminal serve into it. Or any program that supports IMAP.
If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.
Third party client for Exchange 2000
Thanks in Advance