MDM iPad - Mass update without downloading update X times This is a difficult one. I'm going to update around 30 iPads (iOS 8 to 9.2.1) on location with a bad internet connection. Because of the speed and wifi signal I want to download the iOS update only once and install it on all iPads. The problem is, when I connect the devices to my macbook it wants to configure as new or want to use my own last backup. 

Does anyone know how to update all iPads without downloading the same iOS update X times?

Thanks a lot!
An OS X/macOS server with the caching service enabled will prevent all the iPads from fetching the same update from Apple's.