Every time you turn iPhone on it prompts to sign in to who knows what min 4x in a row.
> Power cycle device.
'Apple Verification. Enter the password for "<email>" in Settings.'
> Tap 'Not Now'
'Apple Verification. Enter the password for "<email>" in Settings.'
> Tap 'Not Now'
'Apple Verification. Enter the password for "<email>" in Settings.'
> Tap 'Not Now'
'Apple Verification. Enter the password for "<email>" in Settings.'
> Tap 'Not Now'