Same issues as others have reported: can't edit and save updated events in calendar. iOS 9.2.1
Think this is now fixed after iOS 9.0.2 update.
Same here. Started with the last update before I upgraded to iOS 9. I've tried everything, including deleting and resetting OWA app. I even went to far as to reset my iPhone 6 to out of box condition and then installed OWA. NEVER SEEMS TO SUCCESSFULLY INSTALL THIS LAST UPDATE! Please rollback to last good version as of 9/11/15.
After weeks of having OWA completely unusable, it appears that the recent iOS 9.0.2 update fixed the problem after the app reset (which its done dozens of times and failed in the last month). All appears to be working now! Fingers crossed.
I'm having this same issue since the recent 9/15/15? Update started downloading. It appears to be updating but that's been going on for several days now. I've tried deleting the OWA app from the phone and reinstalling. Called Office 365 support but they say there's no phone support for OWA. Said the was online support thru the OWA but this comment doesn't seem like support. My domain is cioatlarge.com. Please contact me ASAP. I've upgrade this iPhone 6 to iOS 9 and that didn't help.