After upgrading to MobileIron Core v9.1 (9.1.0.0 Build 64) we experienced an issue with new iOS enrolments failing at the “Install Profile” stage with the error message “Profile Installation Failed, Invalid Profile”.
The issue seems to be caused by the “System - iOS Enrollment SCEP” profile being set to “User Certificate” and “Centralized” instead of “Device Certificate” and “Decentralized”.
If you come across this issue make sure you log a ticket with MobileIron Support or your Support Partner as root access to the appliance will be required to fix the fault.
Note: Make sure you capture Full tech logs with Database before any upgrade, this will allow Support to easily replicate faults and provide fixes in future releases.