I seem to be having a problem with iOS8, the same problem on my iPhone 6 & iPad Air. I run Exchange 2010 within my business and have a shared calendar that is present on multiple devices (windows (x4), mac (x1) , iPhone (x3), iPad (x1), etc). This has been working absolutely fine for years now, but since iOS8 I've noticed a particular problem.
If I create an event (with notes) in the shared calendar on either my iPhone or iPad then the event gets created, but the notes don't appear in the shared calendar. Let me explain again...
With a Mac and Windows PC in front of me, I create an event using my iPhone (or iPad) called "TEST". I assign the event to the shared calendar and I add some random notes at the bottom. The event appears and is visible on all devices, but none of the devices can see the notes that I entered apart from the device that I created the event on.
If I create an event on either the Mac or Windows PC (with notes), that event syncs to the iPhone & iPad fine (notes included).
removing and re-adding the calendar on the iPhone (no joy)
removing and re-adding the exchange account on the iPhone (no joy)
removing any unused devices from Exchange OWA "Mobile Phones" page (no joy)
I'm stuck :(
Any help would be greatly appreciated.
P.S. Same issue as here: https://discussions.apple.com/thread/6578203