An error occurred while using single sign-on and enterprise application definitions. The credentials for a user cannot be retrieved, possibly because they do not yet exist, or an unauthorized user is trying to access the single sign-on database.
Do the following:
Ensure that this event has not occurred repeatedly. This event occurs the first time a user tries to access the single sign-on database, and should not recur after the user has entered a valid user name and password. Repeated occurrences of the event may indicate an unauthorized access attempt.
Ensure that you are running a supported topology.
Ensure that you are connected to all databases.
For more information, see the Microsoft SharePoint Products and Technologies Software Development Kit (SDK).
For information about configuring single sign-on, see the Microsoft Office SharePoint Portal Server 2003 Administrator’s Guide.