The most common cause of a "login incorrect" message is the user mistyping the password. Have the user try it again. Make sure the user knows the correct password and understands that passwords are case-sensitive and also that the letter "o" is not interchangeable with the numeral "0," nor is the letter "l" the same as the numeral "1."
Other possible causes of the "login incorrect" message are:
The password has been locked because the user has exceeded an inactivity maximum See "Specifying Maximum Number of Inactive Days".
The password has expired. See "Password Privilege Expiration".
See Chapter 11, Administering Passwords for general information on passwords.