This article was previously published under Q315103
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After you upgrade to Microsoft Office XP Service Pack 1 (SP-1), you cannot connect to an MSN Post Office Protocol version 3 (POP3) server.
MSN users use "MSN/" as part of the logon information in their Microsoft Outlook profile to log on to the account. In Office XP SP-1, there is no longer a need for this tag.
Office XP SP-1 addresses an issue in which the MSN logon process always prompts you for a password. With Office XP SP-1, authentication is against the account logon information instead of the user name. The presence of "MSN/" prevents authentication with the server.
To resolve this issue, delete "MSN/" from the User Name box in the e-mail account properties.
In Outlook, click E-mail Accounts on the Tools menu.
Click View or change existing e-mail accounts, and then click Next.
Click your MSN account, and then click Change.
In the Logon Information section, delete MSN/ from the User Name box, and then click Next.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.