title: Quartz job fires multiple times
body: <p>I have a building block which sets up a Quartz job to send out emails every morning. The job is fired three times every morning instead of once. We have a hosted instance of Blackboard, which I am told runs on three virtual servers. I am guessing this is what is causing the problem, as the building block was previously working fine on a single server installation.</p>
  
  <p>Does anyone have Quartz experience, or could suggest how one might prevent the job from firing multiple times?</p>
  
  <p>Thanks,</p>