“Untrusted App Developer” message when installing enterprise iOS Application

Question

I\'m developing an enterprise application. When I was testing it in iOS8 beta I saw the following alert view:

Untrusted App Developer
Do you trust the develo         


        

Answer 1

On iOS 9:

Settings -> General -> Device Management -> Developer app / your Apple ID -> Add/remove trust there

Answer 2

In iOS 9.1 and lower, go to Settings - General - Profiles - tap on your Profile - tap on Trust button.

Answer 3

You absolutely can avoid this issue if you manage the device with MDM or have access to Apple Configurator.

The solution is to push either the Developer or iOS Distribution certificate to the device via MDM or Apple Configurator. Once you do that, any application signed by that cert will be trusted.

When you click on "Do you trust this developer", you're essentially adding that certificate manually on a per-app basis.

Answer 4

In my case, i just change some step below with iOS 9.3 To solve this problem:

Settings -> General -> Device Management -> Developer app Choose your current developer account name. Taps Trust "Your developer account name" Taps "Trust" in pop up. Done

Answer 5

This issue comes when trust verification of app fails.

You can trust app from Settings shown in below images.

If this dosen't work then delete app and re-install it.

Answer 6

You cannot avoid this unless you distribute an application via the App Store.

You get this message because the application is signed via an enterprise certificate that has not yet been trusted by the user. Apple force this prompt to appear because the application that is being installed hasn't gone through the App Store review process so is technically untrusted.

Once the user has accepted the prompt, the certificate will be marked as trusted and the application can be installed (along with any other future applications that you wish to install that have been signed with the same certificate)

Note: As pointed out in the comments, as of iOS 8, uninstalling all applications from a specific certificate will cause the prompt to be shown again once an application from said certificate is re-installed.

Here is the link to Apple website that confirms this info: https://support.apple.com/en-us/HT204460