You mean from the workstation?
Outlook 2003?
All you need is the dns name for your exchange server.
From the Tools menu, select "Email Accounts." You may have to click the arrows.
Select the radio button next to "Add a new email account" and click the "Next" button.
Select the radio button next to "POP3" and click the "Next" button.
Enter the following information:
User Information
Your Name: Enter your name as you would like it to appear in the "From" field of your outgoing messages.
Email Address: Enter your full Mail address (for example, "user@mydomain.com").
Server Information
Incoming mail server (POP3):
myserver.mydomain.com (or what ever your email servers dns name)
Outgoing mail server (SMTP):
myserver.mydomain.com (or what ever your email servers dns name)
Login Information
User Name: Enter your user
Password: Enter your password.
If you would like to keep a copy of your email messages on the Yahoo! Mail server, select the "Advanced" tab. Check the box next to "Leave a copy of messages on the server."
Click the "OK" button.
Click the "Next" button on the Email Account Wizard, then click "Finished."
Do you mean that?