All system user names are unique within a single Windows 2003 domain.
Your system user names might not be unique if your users are in two or more Windows 2003 domains or you have both UNIX users and Windows users.
You cannot use system user names if you are using Rational DOORS Web Access to access the database.
Judy Brown is using Windows XP Professional. Her system user name is Judy, and this user name is recorded in her Rational DOORS user account. No other Rational DOORS user has the same system user name, so when she starts Rational DOORS, she does not need to type her Rational DOORS user name.
Now you create an account for Judy Smith, who is using Windows 2003, and whose system user name is also Judy. You enter her system user name in her user account.
When either Judy Brown or Judy Smith start Rational DOORS, they must type their Rational DOORS user name on the login screen, because there are now two users with the same system user name.
If you forgot to enter the system user name for Judy Smith in her user account and ignored the warning message, Rational DOORS cannot tell that there are two users with identical system user names. When Judy Smith logs on to her computer and runs Rational DOORS, her system user name is matched with the user account for Judy Brown.
She contacts her database manager, who can fix the problem by either disabling system user names or entering her system user name in her account record.