iPhone 6 Exchange inbox not synchronizing

hi community!

since two days ago my exhange inbox is not loading on my iPhone 6. Agenda and sending e-mails is not a problem, only the inbox. In settings all of the boxes are ticked so no error there.

I Tried resetting network settings, rebooting but nothing seems to work. Internet tells me it is a iOS 8 problem, has anyone found a solution???

please help!

Thank you!