Oracle account is locked or oracle user account logon denied

Following the below steps:

 

Oracle account is locked

1. Type "Conn /as sysdba" in the sqlplus window;

2. Type "alter user AccountName unlocked. Try to logon again.

 

Oracle user account logon denied

1. Type "Conn /as sysdba" in the sqlplus window;

2. Type "alter user AccountName identified by NEWPASSWORD.