DBA's are expecting an alert in EM on password change, but no alerts were not received.
Changes sys password using:
alter user sys identified by <new_pwd> --> at 4:17 am EST , 19-APR-2013
In OEM also updated sys password with in 20 mins from at 4:17 am EST
But, no alerts were reported for this password change.
i) By default is EM 12c monitors password changes ? If no. ..
ii) How to setup EM 12c to monitor password changes with 12c ?
1- No. At least I have never seen an alert for this.
2- You can create a Metric Extension. See http://docs.oracle.com/cd/E25178_01/doc.1111/e24473/metric_extension.htm using the view sys.user$. PTIME will show you the Password Change Time.