Companies relying upon Microsoft Intune for managing iOS 7 devices will soon need to update or replace those devices to continue support.  Per an informational bulletin in the Intune Admin Portal, support for iOS 7 (specifically for the Intune Company Portal app) will be ending in the near future. 

As the bulletin states, very soon users will no longer be able to enroll new devices via the Microsoft Intune Company Portal application from the iTunes app store, and currently enrolled devices running iOS 7.x will only continue to be managed for a limited time.  In particular, this will affect any users still holding on to their iPhone 4 as there will not be a release of iOS 8.x or later for the platform. 

This update is not a real surprise as some of the primary Microsoft Office mobile applications (particularly Outlook) require iOS 8.x or later to be installed, but there are many business users still relying upon their iPhone 4 to access corporate data.