Intune - 'Safari cannot open the page because address is invalid' error when you open a web app on iOS

This article fixes an issue in which you can't open a Web App on an iOS device with the Safari cannot open the page because the address is invalid error message.

Original product version:   Microsoft Intune
Original KB number:   4487249

Symptoms

When you select a Web App that's deployed to an Apple iOS device, you receive the following error message:

Safari cannot open the page because the address is invalid

Cause

This issue occurs if both the following conditions are true:

• The Web App configuration in the Intune console has the Require a managed browser to open this link option set to Yes.
• The Intune Managed Browser for iOS app isn't installed on the device.

Resolution

To fix this issue, either install the Intune Managed Browser on the iOS device or set the Require a managed browser to open this link option in the policy to No.