¡Me salvo el trabajo!

Estas instrucciones me ayudaron a resolver el problema de contraseña vencida del sysman, cuenta con la que se puede accesar a la consola del oracle

Ensure that ORACLE_HOME is set to the correct home

1. Stop the standalone dbconsole on Unix
   $ emctl stop dbconsole on Windows Stop the Windows Service Oracle<oracle_home_name>DBConsole
   Or
   Open a DOS Command Window and type
   C> emctl stop dbconsole
   
2. Check that the standalone dbconsole is stopped on Unix
   $ emctl status dbconsole on Windows
   Check the status of the Windows Service Oracle<oracle_home_name>DBConsole
   Or
   Open a DOS Command Window and type
   C> emctl status dbconsole
   
3. Connect to the database as a user with DBA privilege with SQL*Plus  and execute
   SQL> alter user sysman identified by <new_password> ;
   
4. Check the new password
   SQL> connect sysman/<new_password>[@database_alias]
   
5. Go to $ORACLE_HOME/host_sid/sysman/config
   
1. Save the file emoms.properties to  emoms.properties.orig
   
2. Edit the file emoms.properties
   
1. Search for the line beginning with:
   oracle.sysman.eml.mntr.emdRepPwd=
   Replace the encrypted value by the new password value
   
2. Search for the line:
   oracle.sysman.eml.mntr.emdRepPwdEncrypted=TRUE
   Replace TRUE by FALSE
   
6. Restart the standalone dbconsole on Unix
   $ emctl start dbconsole
   on Windows Start the Windows Service Oracle<oracle_home_name>DBConsole
   Or
   Open a DOS Command Window and type
   C> emctl start dbconsole
   
7. Check that the password has been encrypted
   Edit the file emoms.properties
   
1. Search for the line beginning with:
   oracle.sysman.eml.mntr.emdRepPwd=
   Check that the password is encrypted
   
2. Search for the line beginning with:
   oracle.sysman.eml.mntr.emdRepPwdEncrypted=
   Check that the value is TRUE