Instructions apply to iOS 9 and up.
If you’re uncertain, avoid trusting the app, as your personal data and iPhone could be compromised.
Download and set up the app.

TapCancelto end the message.
Go to the iPhone Home screen and tapSettings.
In the iOSSettings, scroll down and tapGeneral.
Scroll down and tapProfiles,Profiles & rig Management, orDevice Management, depending on the iOS version.
The Profiles / machine Management prefs screen only shows up if your employer remotely manages your machine.
A regular consumer-grade iPhone or iPad does not offer this screen.
In theEnterprise Appsection, tap the profile name for the developer of the untrusted app.
TapTrust [Developer Name]and confirm your choice.
The verification only takes place if you have an active internet connection.
Check with your administrator for help.
Why Do it’s crucial that you Trust and Verify Apps on iOS?
This process is frequently necessary with enterprise apps that are created by an employer for internal use.
FAQ
Check to see to it you have a stable internet connection.
If the app still can’t be verified, tryupdating your iPhone.
Connect your iPhone to your system with a USB cable.
Then, on your iPhone, tapAllowin the pop-up window to trust the equipment.
The next time you connect to any computer, you’ll be asked to trust the gear.