Thanks @NFtoBC 🙂
I've tried that before. A lot of the calendars don't intergrate well with exchange accounts unfortunately. I've done a lot of research and testing over the past few weeks, but nothing seems to work as well as the native iPhone app. 😞
I believe Readdle has a promo going where their Calendars 5 app is Currently a Free Download ($6.99 value). Might be only for today though.
Edit: Just checked their twitter feed and it is free for for 48 hours.