title: How can I install iPad Apps on multiple iPads?
body: <p>I have developed an iPad app, and made a distribution provision profile for appstore, I need to install my developed app on 30 iPads for an event, but I couldn't install it. I have en error message which is: (The app "xxxx" was not installed on the iPad "My iPad name" because the signer is not valid).</p>
  
  <p>How can I solve this problem and install my app on the number of iPads I want?</p>