“Untrusted App Developer” message when installing enterprise iOS Application

Today, I was testing this with iOS 9 Beta and found the solution.

To solve it, go to:

  1. Settings -> General -> Profiles [Device Management on iOS 10]
  2. Under ENTERPRISE APP, choose your current developer account name.
  3. Tap Trust “Your developer account name”
  4. Tap “Trust” in pop up.
  5. Done

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