Getting locked out my domain account every 15 to 30 minutes

Review the security event logs on the domain controller.  You should be able to see logon failures logged and it should show the offending machine.

It's probalby a server service that is using the old logon password.

Along the lines of xuserx2000's comments.....

As a general rule of thumb, it is better to have service accounts (local or domain) to run services and scheduled tasks.  If your account is consistently getting locked out every 30 minutes or hour, it could also be a scheduled task in addition to a Windows service.

Senario:  I work for a large company as a DBA, Our network admin doesn't allow us to have the SQLservice account password, so when we do un upgrade or patch we have to use our login to gain access tempararaly to network resources, then we notify her of the service that needs the logon reassigned.  the problem is as stupid as i ws a did not write the server down that was updated upto 4 months ago. so now i am left with as much as a 15 minute window to research what server it was.  

All I know is at .25 cents a password change i will be reinvesting in our economy at a rate equal to the federal government!  :(

LOL!  Your system Admin should be able to audit your DC to determine the bad password's origination.  Once that is discovered, it should be a relatively simple thing to log into that server and change the security settings.  Still, it may cost more than $.25. :)

DrUltima,  You would think so, but the admins don't like to share information with us, I know how to check it, (having been an admin in the past) its that I dont have admin access to look at the dc logs.  so its social engineer or hack, so lets just say that SE is not a solution when dealing with drones.

agree with DrUltima.

You have a problem, and the sys admin's should be at least helpoing to get it fixed for you.  Especially since you do not have access to fix it yourself.