Since the last update, the app doesnt notify (i.e. Number of new emails on the badge) on new emails received, and the alert notification never worked anyway. Need to open the app to see if new emails came in. I uninstalled-reinstalled, to no avail. Very annoying!!!
Tech specs: iPhone 6, iOS 9.2.1
Cogeeto about OWA for iPhone, v1.0.12