Hello experts, In one of our production database, XS$NULL account's status shows open and application profile has been assigned to this account. This becomes an issue (security team) and I have to change the account status and profile back to what it supposed to be (account_status : EXPIRED & LOCKED , profile : DEFAULT). I know we won't be able to alter this account (11gR2 and later) anymore. I thought the best way maybe to deinstall and re-install XDB component. I appreciate your time and suggestion(s). Regards, Ali