The error is telling you that the account is locked. can you confirm you can connect w/ some other tool?
I can login using sys in the server
Hi V PJS,
just to be sure, do have an Active Data Guard enabled?
Then you maybe hit a bug.
Can you connect via TNS Alias?
sqlplus sys@cfstdby as sysdba
Just consider to rename your standby database.
If you have to do a failover or switchover your new Primary database will be CFSTBY. Which sounds a little bit weird.
I prefer to set the db_unique_name to <DB_NAME>_SITE1 and <DB_NAME>_SITE2. So the name doesn't reflect the database role anymore.