iOS10.3 bug Re-enabled services at some Cloud Users Accidentally
Due to a failure / bug in the new ios 10.3 firmware apple advise you to recheck your icloud settings. It seems that iOS 10.3.1 fixes the error but for those who are using iOS10.3 the apple email is clear, it asks to reconfirm the icloud settings. This failure is not for all users it applies to a small number of icloud users.
what should be the problem:
For what we understand iOS 10.3, released on March 27, introduced a new Apple Filesystem among other major features like Find My AirPods, plus it included an overhauled iCloud storage breakdown, which may explain why some iCloud services were mistakenly turned back on without user be notified.
-IOS10.3 may have inadvertently re-enabled some iCloud services that you had previously disabled on your device.
To fix this iOS10.3 bug Re-enabled services at some Cloud Users Accidentally please update your firmware to IOS10.3 or downgrade IOS 10.3 to iOS10.2.1.