How do you remove a saved user login name, who used a .Net Passport, from my MSN Messenger Sign-In Box?

A friend signed onto MSN Messenger on my computer but had to sign in using a .Net Passport because they cannot sign in the regular way, now their email address is saved on my normal Messenger sign-in box. I can click on that saved name/emailaddress and instantly sign onto THIER messenger account without having to type in a password and see their contacts. How do I delete or remove their name from my box so that I and anyone else cannot access their messenger list?

How the box looks is: you have THEIR email address which you can click on and instantly bring up their contacts/messenger, then below that the normal things you can click on that says, "Click Here to sign in", then below that you have the other thing you can click on that says, "To sign in with a different account, click here"

Control Panel
User Accounts
Click on your name if you are the Administrator
Manage my Network Passports
Delete the appropriate users.
If you want to delete all and start from scratch for your accounts, delete everything. That will force you to log in with your passport and password for all of your accounts if you have more than one.

hi
open MSN
click on the friends name and address
tick the option 'don't remenber me'
then sign in

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