Just started to try out outlook the other day with iOS and today when I tried to use it it crashes right away. I upgraded to iOS 9 yesterday and saw this problem just now. Anyone else have this problem too?
I haven't had the Outlook for iOS app installed in quite some time so I can't really say. It's possible that it may need to be updated. Alternatively, you can try deleting the app, rebooting the phone and then reinstalling the app to see if you're able to use it.
Seeing this same issue all over the internet. I am also experiancing it. Deleting and reinstalling worked, until I added a second email account. Now it crashes again at startup. Same issue on iPhone 6 and on iPad. Hoping a fix comes soon. I've gotten spoiled by how much better Outlook on iOS is than Apple Mail.