FIX: You receive the "530 User \username cannot log in" error message when you try to log on to an FTP site that is hosted by Internet Information Services 5.0

When you try to log on to a File Transfer Protocol (FTP) site that is hosted by Microsoft Internet Information Services (IIS) 5.0, you receive an error message that is similar to the following:

This problem occurs when the following conditions are true:

• You try to log on by using "\username" and a password. You use "\" to indicate that a local domain or a trusted domain is not supported.
• You install the hotfix that is mentioned in the following article:
  
  For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
  288855  (http://support.microsoft.com/kb/288855/ ) MS01-026: FTP service allows login to domain guest account
• You install Microsoft Windows 2000 Security Roll Up Package 1 that is mentioned in the following article:
  
  For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
  311401  (http://support.microsoft.com/kb/311401/ ) Windows 2000 Security Rollup Package 1 (SR), January 2002
• You install Windows 2000 Service Pack 3.

To resolve this problem, install Windows 2000 Service Pack 4. Alternatively, you can apply the hotfix that is mentioned in this section.

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.