Active Directory - Troubleshooting Account Lockout information
Troubleshooting Account Lockout (Technet)
https://technet.microsoft.com/en-us/library/cc773155(WS.10).aspx
Account Lockout and Management Tools
Account Lockout Status (LockoutStatus.exe)
SCOM Alerts & Audit Collection Services
You should be able to setup an event collection on the Security event log for that lockout and a few other events so that you get an alert. Here a just a few events that you could alert on to help monitor that account.
Event ID 531 : Account disabled
Event ID 532 : Account expired
Event ID 535 : Password expired
Event ID 539 : Logon Failure: Account locked out
Event ID 644 : User account Locked out
These article have a pretty good list of other security event id’s that you can alert on as well.