Click twice on the "My Computer" icon. This can be found on the desktop (the opening screen).

Click twice on the "Dial-up Networking" icon.

Click "OK"

Type a name for the connection in the text box.
Click on the "Next" button.

Select "I am calling the internet."
Select "Send my plain text password if that's the only way to connect."
Select "The non-Windows NT server I am Calling expects me to type login information after connecting or to know TCP/IP addresses before dialling."
Click on the "Next" button.

Enter dial-up number in the "Telephone number" text box.
Click on the "Next" button

Select "Point-to Point Protocol (PPP)"
Click on the "Next" button

Select "None"
Click on the "Next" button

Click on the "Next" button

Click on the "Next" button

Click on the "Finish" button

Enter details. Click on the "Dial" button

Enter username in the "Username Field" using the format username@domain.com
Enter password in the "Password Field"
Leave "Domain" text box empty
Click "OK"